content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Why does the power series of sin(x) require radian?
September 9th 2013, 12:22 PM #1
Newbie
Joined
Mar 2013
From
North Yorkshire, UK
Posts
10
Thanks
3
Why does the power series of sin(x) require radian?
I learnt the maclaurin series of sin x and then i realised it cant work for both degrees and ra... | 5 | [
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0.00344848... | 500 | 500 | |
Trig Help (URGENT)
Posted by Anonymous on Wednesday, February 22, 2012 at 10:25pm.
Solve over the indicated interval:
2sin^2x=sqrt2sinx , [-180,180)
don't how to get x by itself
please help and thank you
• Trig Help (URGENT) - Reiny, Wednesday, February 22, 2012 at 10:57pm
let sinx = y, so you get
2y^2... | 4 | [
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SparkNotes
What is an Inequality?
An inequality is a statement that shows the relationship between two (or more) expressions with one of the following five signs: < , ≤ , > , ≥ , ≠ .
x < y means " x is less than y "
x≤y means " x is less than or equal to y "
x > y means " x is greater than y "
x≥y me... | 4 | [
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Need Some Guidance
August 24th 2009, 05:20 PM
Just4
Need Some Guidance
Solve.
15x^4 - 28x^2 + 5 = 0
substitution should result in a quadratic equation in the variable u, ie
I let u = x^2
15u^4 - 28x^2 + 5= 0
15u^2 - 28u + 5 = 0
I used the quadratic formula
-(-28) + or - sqrt -28^2... | 4 | [
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Homework Help
Posted by tim on Wednesday, November 14, 2012 at 1:10am.
okay i need to find the derivative of
f(x)=cosπ(x^2)
and if you could show steps it would be GREATLY appreciated. thank you so much!
• calculus - Bosnian, Wednesday, November 14, 2012 at 1:34am
Go on :
calc101 dot com
When page ... | 5 | [
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Homework Help
Posted by Kevin on Friday, March 15, 2013 at 5:18pm.
Optimization Problem
A right circular cylindrical can of volume 128tπ cm^3 is to be manufactured by a company to store their newest kind of soup. They want to minimize the surface area of the can to keep costs down.
What are the dimensions of the can... | 5 | [
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Calculus AB: Applications of the Derivative
Average Rates of Change
Suppose s(t) = 2t ^3 represents the position of a race car along a straight track, measured in feet from the starting line at time t seconds. What is the average rate of change of s(t) from t = 2 to
t = 3 ?
The average rate of change is equal to the... | 5 | [
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**Hexagon Help**
April 30th 2006, 11:20 PM
Chuck_3000
**Hexagon Help**
I am stuck with this question, can anyone help?
Hexagon ABCDEF has the following properties:
i. diagonals AC, CE and EA are all the same length
ii. angles ABC and CDE are both 90 degrees
iii. all the sides of the hexagon have... | 4 | [
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Laplace transform of Bessel functions
January 22nd 2010, 08:20 AM #1
Newbie
Joined
Jan 2010
Posts
2
Laplace transform of Bessel functions
Dear all,
I would like to ask if anyone of you knows where to get the Laplace transform of the following function:
f(t) = I_n(a*t) * J_m(b*sqrt{t})
With... | 5 | [
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Physics Classical Mechanics
A block of mass m=2 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=Beta t^2, where Beta = 1.0 N/s^2. We
stop pushing at time t1, 5s [F(t)=0 for t>1].
(a) First, assume the surface is frictionless. Wh... | 5 | [
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S.O.S. Mathematics CyberBoard
Hello, thesocialnetwork!
Quote:
Three cards are drawn from an ordinary pack of 52 cards, at random without replacement.
Cards drawn have the following values:
. . Aces score 1 point,
. . Tens, Jacks, Queens and Kings score 10 points,
. . Other number cards score as many points as their n... | 4 | [
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Homework Help
Posted by kelly on Tuesday, April 17, 2007 at 6:02pm.
for the parametric curve defined by x=3-2t^2 and y=5-2t ...sketch the curve using the parametric equation to plot of the point. use an arrow to indicate the direction of the curve for o<t<1. Find an
equation for the line tangent to the curve at the po... | 5 | [
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8th Grade Algebra
Posted by Bridget on Tuesday, May 5, 2009 at 10:40pm.
Multiply.
1) (3t^2 - 2t - 4) * (5t + 9)
Writing.
1) Explain why the product of a quadratic polynomial and a linear polynomial must be a cubic polynomial.
• 8th Grade Algebra - RickP, Tuesday, May 5, 2009 at 11:35pm
(3t^2 - 2t - 4) * (5t... | 4 | [
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Path Integral
December 11th 2008, 05:21 AM #1
Path Integral
I have to compute the arc length of $r = 1 + cos(\theta)$
I found the formula $\int_0^{2\pi} \sqrt{r^2+(\frac{dr}{d\theta})^2} d\theta = \int_0^{2\pi} \sqrt{2+2cos(\theta)} d\theta$*
I don't know how to do this integral.
Can you please help m... | 5 | [
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Finding sinx formed by 2 rays.
November 10th 2013, 10:39 AM #1
Finding sinx formed by 2 rays.
Re: Finding sinx formed by 2 rays.
You did both correctly.
For the first part, you can figure out most if it using only geometry. A right triangle with two equal sides is a 45-45-90 triangle. A right triangle with ... | 4 | [
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finding all squares
Let $n^2+9n+14=a^2$, where $a$ is an integer. $n^2+9n+14-a^2=0$ Let us now calculate the discriminant of this quadratic equation in $n$. $\Delta=81-4(14-a^2)=25+4a^2=5^2+(2a)^2$ In order for $n$ to
be an integer, we need $\Delta$ to be a perfect square. The only Pythagorean triple that has 5 as one ... | 4 | [
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MATH (PLease HELp)
Posted by Tiffany on Tuesday, October 18, 2011 at 4:14pm.
Sally has three times as many dimes as nickels and twice as many quarters as dimes.In all she has $5.55. How many coins of each type does she have?
Let 2x=quarters
3x=dimes
x=nickles <---- is that correct please help put
• MATH (PLease ... | 4 | [
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Logarithmic Functions
The Common Logarithmic Function
The function f (x) = log[10] x is called the common logarithmic function. The common log function is often written as f (x) = log x -- when log is written without a base, the base is assumed to be
10. The " log " button on most calculators means log[10] .
Example... | 4 | [
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0.0021362... | 517 | 517 | |
Posts by
Total # Posts: 639
Pyhsics(Stress&Strain)
1) Calculate the tensile stress in a 33.000mm diameter rod subjected to a pull of 30.000kN. ANS= MPa (Round to 3 decimal places) Diameter = 33.000mm = 0.033m 30.000kN = 30000N Area = pi*d^2/4 =
3.1416 * 0.033^2/ 4 = 3.1416 *0.001089/ 4 = 0.0034212024/ 4 = 8.553006*10... | 4 | [
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Re: loops in irreducible graph?
stoltz@cse.ogi.edu (Eric Stoltz)
Fri, 14 Jan 1994 01:33:00 GMT
From comp.compilers
| List of all articles for this mon... | 4 | [
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... | 519 | 519 | |
Homework Help
Posted by khela on Thursday, October 28, 2010 at 8:26pm.
find the limit of
lim sin(x-1)/(x^2 + x - 2)
x->1
• maths - jai, Thursday, October 28, 2010 at 9:29pm
i interpreted this in two ways:
first,
lim [sin(x-1)]/(x^2 + x - 2) as x->1
*since, there is no common factor between numera... | 5 | [
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Recurrence relation
October 3rd 2010, 10:55 AM #1
Newbie
Joined
Oct 2010
Posts
1
Recurrence relation
Hello,
I cannot solve the following problem:
What can we say about the asymptotic behavior, depending on the initial conditions, of a recurrence relation that has a inhomogeneous part (log n)^(lo... | 5 | [
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Homework Help
Posted by Dee on Monday, February 26, 2007 at 10:52am.
Derivative
Differentiate
f(x)=(5x-4)^2
There are two ways to do this:
(1) let u = 5x-4, and use the "chain rule", df/dx = df/du * du/dx
OR
(2) expand the polynomial to
f(x) = 25 x^2 -40x + 16
and differentialte it term-by-term.
You will get ... | 4 | [
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Homework Help
Posted by Meherin on Thursday, March 13, 2008 at 8:27pm.
I just need a description of the following:
Associative property of Multiplication
Associative Property of Addition
Commutative properties
Distributive Property
Identity property(I dont need to know much about this)
Zero property(i dont need ... | 4 | [
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Algebra/Number Theory
Posted by John Berkhamp on Tuesday, July 23, 2013 at 1:29pm.
In a sequence of four positive numbers, the first three are in geometric progression and the last three are in arithmetic progression. The first number is 12 and the last number is 452. The sum of
the two middle numbers can be written a... | 4 | [
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numpy.fft.ifft
numpy.fft.ifft¶
numpy.fft.ifft(a, n=None, axis=-1)[source]¶
Compute the one-dimensional inverse discrete Fourier Transform.
This function computes the inverse of the one-dimensional n-point discrete Fourier transform computed by fft. In other words, ifft(fft(a)) == a to within numerical accura... | 5 | [
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Hahn-Banach Theorem (Normed Spaces)
May 2nd 2011, 04:45 AM #1
Member
Joined
Sep 2009
Posts
161
Hahn-Banach Theorem (Normed Spaces)
Dear Colleagues,
I have a problem in the attachment and could you please help me in solving it.
Best Regards.
Raed.
Since $\mathbb{R}^n$ is an inner-prod... | 4 | [
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Please - Need help tonight on a couple more calc problems
Last edited by JohnSena; May 23rd 2006 at 10:54 PM.
JohnSena This is an exponential problem since you remove 17% it is the same as saying 83% of the total amount thus, $A(t)=100(.83)^t$ For the second part you need to find, $100(.83)^3\approx 57.18$
JohnSena a... | 5 | [
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-0.05615234375,
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0.138671875,
-0.0078125,
0.099609375,
0.01470947265625,
-0.0091552734375,
0.01287841796875,
0.040771484375,
0.050048828125,
0.09375,
-0.0224609375,
0.0224609375,
-0.099... | 527 | 527 | |
Algebra word problem help
Posted by Shawn on Friday, November 21, 2008 at 2:54pm.
The average walking speed R of people living in a city of population P,in thousands, is given by R=0.37InP+0.05, where R is in feet per second.
a.) The population of Honolulu, Hawaii is 395,790. Find the average walking speed.
b.) A ci... | 4 | [
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-0.03515625,
-0.088867... | 528 | 528 | |
Find the x−coordinate of the point A
October 7th 2010, 02:47 AM
blackdragon190
Find the x−coordinate of the point A
I'm given the function $f(x)=-3x(x-2)$ and must work out the x coordinate on f(x), A, which a line dividing the area between the function and the x-axis from [0,2] into 2 parts of equal area
pa... | 5 | [
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0.061279296875,
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0.040771484375,
0.0303955078125,
-0.047363281... | 529 | 529 | |
Trigonomic Proof.
Last edited by xMichaelx; July 2nd 2010 at 06:41 PM.
Hello, xMichaelx! A Cone has a slant height $m$ and a semi-vertical angle $2a$ Prove that the radius $r$ of the inscribed sphere is given by: . . $r\:=\: \frac {m\sin 4a}{2(1+\sin 2a)}$ Code: A o /|\
/ | \ / |2a\ / | \ / | \ / * * * \ /* | *\ E * |... | 4 | [
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0.0... | 530 | 530 | |
SparkNotes: SAT Subject Test: Math Level 1: Solving Right Triangles
9.1 Basic Functions 9.6 Radians and Degrees
9.2 Solving Right Triangles 9.7 Graphing in the Entire Coordinate Plane
9.3 Trigonometric Identities 9.8 Key Formulas
9.4 Graphing Trigonometric Functions 9.9 Review ... | 4 | [
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-0.0... | 531 | 531 | |
Homework Help
Posted by P.Smith on Saturday, February 6, 2010 at 5:05pm.
Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for the specified variable.
A student took out two loans totaling $10,000 to help pay for col... | 4 | [
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0.... | 532 | 532 | |
Homework Help
Posted by G on Thursday, July 8, 2010 at 6:13pm.
The area of a rectangle is 24, and its diagonal is radical 52. Find its dimensions and perimeter.
Longer side = ?
Shorter side = ?
Perimeter = ?
• math - drwls, Thursday, July 8, 2010 at 8:12pm
Let the dimensions be a and b.
ab = 24
a^2 ... | 4 | [
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... | 533 | 533 | |
Finding a matrix from a linear transformation
February 5th 2013, 03:15 PM
jezb5
Finding a matrix from a linear transformation
not sure if this is classed as advanced algebra but here goes.
I need to find the matrix of t and I am confused as to which is the correct method to use.
The basis for the d... | 5 | [
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-0.10205078125,... | 534 | 534 | |
recurrance relation
May 13th 2009, 05:16 PM #1
Newbie
Joined
May 2009
Posts
1
recurrance relation
I'm working on this R.R.:
$a_n = a_{n-1} + n(n+1)$
$a_0 = 3$
when I get to this part of the soln, I am unsure how to get from
$a_n = a_{n-1} + n(n+1) = a_{n-1}+n^2+n$
.
.
.
... | 4 | [
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is this complete ?
December 21st 2007, 09:56 AM
jenko
is this complete ?
using the equation VT(power n) = C
cuttin speed tool life
180m/min 30
250m/min 12
v1=180
t1=30
v2=250
t2=12
logv1+logt1=log c
logv2+logt2=log c
log180+nlog30
log250+nlog12
2.255+n1.477
... | 5 | [
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A simpler way to predict bolt preload
Generalized torque coefficients and a universal torque table give engineers an easier path to accurate bolt preloading
Authored by:
Moo-Zung Lee
West Hills, Calif.
Edited by Kenneth J. Korane
ken.korane@penton.com
Key points:
• Engineers traditionally use a laborious, trial-and-e... | 5 | [
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-... | 537 | 537 | |
Homework Help
Posted by Crash on Tuesday, January 8, 2013 at 12:34pm.
A 0.46 kg mass oscillates in simple harmonic motion on a spring that has a spring constant of 2080 N/m. The spring was initially compressed 9.4 cm (a negative displacement) at t = 0 s. What's the
velocity in m/s of the mass at t = 0.24 s?
• Physi... | 4 | [
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plss answer fast math algebra
Posted by rhodora on Friday, October 11, 2013 at 9:05am.
the ratio of the measure of the complementsof two angle is3:4while the ratio of the measure of their supplements is 9:10 find the measure of each angle.
• plss answer fast math algebra - Reiny, Friday, October 11, 2013 at 9:46am
... | 4 | [
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Help with tangent function
June 29th 2005, 12:19 AM #1
Junior Member
Joined
Jun 2005
Posts
43
Help with tangent function
Hi, here's my example from my math book that I don't understand.
Sketch the graph of y = -3 tan 2x.
By solving the equations
2x = - pi/2 and 2x = pi/2
x = -pi/2 x =... | 4 | [
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... | 540 | 540 | |
Homework Help
algebra - Akhil Raj, Saturday, March 9, 2013 at 10:22am
following the pattern, the assumptions could be:
1->3
3->4 or 5
4->12 or 5->15
12->13 or 14 and 15->16 or 17
.
.
. and so on..
now assuming that respective stages comprises of numbers(let it be x) to which 1 and 2 was added, followed by the numbers ... | 4 | [
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-0.07177734... | 541 | 541 | |
Splitting middle term of quadratic
Split the middle term of a quadratic equation in order to factorise it.
This topic is part of the TCS FREE high school mathematics 'How-to Library', and will help you to how to split the middle term of a quadratic equat... | 4 | [
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-0.048828125,
0.0634765625,
-0.... | 542 | 542 | |
Homework Help
Posted by Debra on Sunday, October 23, 2011 at 12:56am.
1. How much heat energy is lost by 3 kg of water when it cools from 80 degrees C to 10 degrees C?
2. A 300 g piece of aluminum is heated from 30 degrees C to 150 degrees C. What amount of heat energy is absorbed?
3. Determine the temperature chang... | 4 | [
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-0.... | 543 | 543 | |
expansion of infinite series
February 25th 2009, 11:11 PM #1
Senior Member
Joined
Jan 2009
Posts
381
expansion of infinite series
$f(x)=\frac{x^2+5x}{(1+x)(1-x)^2}$
If the expansion of f(x) in ascending power of x is
$c_0+c_1x+c_2x+c_3x+...+c_rx^r+...$
find $c_0,c_1$ and $c_2$ and show tha... | 5 | [
-0.0712890625,
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-0.045654296875,
-0.00182342529296875,
... | 544 | 544 | |
Continuous random variables – probability density functions
November 4th 2008, 07:18 PM #1
Member
Joined
Sep 2007
Posts
198
Continuous random variables – probability density functions
The following could represent a probability density function (p.d.f.) or not. If could, find the value of k.
$<br />... | 5 | [
0.01953125,
0.0162353515625,
0.00921630859375,
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0.00897216796875,
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-0.0751953125,
0.04931640625,
-0.075... | 545 | 545 | |
Learning
Exclusive offer: get 50% off this eBook here
F# for Quantitative Finance — Save 50%
An introductory guide to utilizing F# for quantitative finance leveraging the .NET platform with this booka and ebook
£16.99 £8.50
by Johan Astborg | December 2013 | Open Source
In this article by Johan Astborg, author of... | 5 | [
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-... | 546 | 546 | |
Jacobian Determinants (Implicit differentiation)
October 31st 2010, 09:20 AM #1
Member
Joined
Jan 2010
Posts
144
The equations,
$x^{2} + y +3s^{2} + s = 2t-1, y^{2} - x^{4} +2st +7 = 6s^{2}t^{2}$
define s and t as functions of x and y. Find $\frac{\partial s}{\partial x}$ when s = 0 and t = 1. A... | 5 | [
-0.0576171875,
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0.0130615234375,
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-0.010009765625,
-0.033447265625,
-0... | 547 | 547 | |
Homework Help
Posted by hello on Monday, July 1, 2013 at 11:02pm.
Solve the equation. Express your answer in trigonometric form.
x^5-11=0
I know the answer is:
11^1/5(cos α + i sin α) for α = 0°, 72°, 144°, 216°, 288°.
But I don't know where to even start working on this problem.
• Trignometry - Steve, Monday, ... | 5 | [
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... | 548 | 548 | |
Homework Help
Posted by Maxie on Thursday, December 4, 2008 at 8:09pm.
The length of a rectangle is 8 cm greater than its width. Find the dimensions of the rectangle if its area is 105 cm.
How do I solve?
• Math - Cianán, Thursday, December 4, 2008 at 8:34pm
Area = Length*Width
Information you are given:... | 4 | [
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... | 549 | 549 | |
Derivative to Analyze Functions
Problem : f (x) = x ^3 -4x ^2 - 4 . Show where f (x) is increasing and where it is decreasing.
f'(x) = 3x ^2 - 8x
;
f'(x) = 0
at
x = 0
and
x =
. The sign of the derivative is reported on the number line below:
So,
f
is increasing on
(- ∞, 0)
and
(
, and it is decreasing o... | 4 | [
-0.046142578125,
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0.0213623046875,
-0.031494140625,
0.0166015625,
-0.0903... | 550 | 550 | |
Posts by
Total # Posts: 6
Matrices
Gaussian row elimination method: (i) x+3y+z=4 x-2y-2z=3 2x+y-z=9 (ii) x+2z+y=0 2x+y+z=6 3x+3y+2z=14
Maths
The diameter of a ball bearing is to have an averageof 2.0 Cm. A random sampling of 10 bearings is selected every hour to check the diameters. The sample selected at 9 a.m gave... | 4 | [
-0.016845703125,
-0.010009765625,
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-0.011962890625,
-0.0172119140625,
-0.0324707031... | 551 | 551 | |
Homework Help
Posted by Ash on Sunday, September 6, 2009 at 12:40pm.
square root of 3x-4 = (x-4)^2-3
Normally, I either take the square root of both sides or I square both sides. Since there is a sqared and a square root, I am confused on how to go about it. Could you please head me in the right
direction?
• Pre C... | 4 | [
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0.0002040863037109375,
... | 552 | 552 | |
Mean speed
I walk 1km up the hill at 4km/h and 1km down the hill at 6km/h. What is my mean speed?
Quote: Originally Posted by Natasha1 Average speed (ie mean speed) is defined as "total distance travelled" divided by "time to travel the distance." (It is a common error to find two speeds and take
a geometric average.)... | 4 | [
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0.060302734375,
-0.05810546875,
0... | 553 | 553 | |
Four (long?) vertex problems
July 7th 2006, 08:42 PM #1
Newbie
Joined
Mar 2006
Posts
15
Four (long?) vertex problems
Here are some vertex problems that I don't understant, if anyone does please teach me
1. V lies in the first quadrant of the graph and makes an angle pi/3 with the positive x-axis. An... | 4 | [
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0.0625,
-0.043701171875,
0.091796875,
-0.004425048828125,
0.045166015625,
-0.... | 554 | 554 | |
Bounds for integration in joint pdf
April 27th 2008, 08:41 PM #1
Junior Member
Joined
Dec 2007
Posts
32
Bounds for integration in joint pdf
Hi,
Let f(x,y) = 3/2 if 0<=x<=1 and x^2<=y<=1; otherwise f(x,y)=0
Find
P(X=1/4, 0<y<3)
So I know I'm suppose to do double integration. My bounds ... | 5 | [
0.0927734375,
-0.04248046875,
-0.046630859375,
-0.11572265625,
-0.0517578125,
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0.023193359375,
0.00408935546875,
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0.005401611328125,
0.051513671875,
0.07373046875,
0.013671875,
0.052490234375,
-0.10937... | 555 | 555 | |
Homework Help
Posted by Bob on Friday, November 11, 2011 at 11:32am.
If A is between 270degrees and 360degrees, and cos A=12/13, find the exact value of:
sin2a, cos2a, sin1/2a, cos1/2a
• trig/math - Steve, Friday, November 11, 2011 at 12:18pm
since acos(12/13) = .39479, a = 2*pi - .39479 = 5.88839
2a = 1... | 4 | [
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0.047607421875,
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0.021728515625,
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-0.02380371... | 556 | 556 | |
Li
Narrow Search
Earth and space science
Mathematics
Sort by:
Per page:
Now showing results 1-10 of 17
This is a lesson about the shape of objects in space. Learners will observe the surface of rotating potatoes to help them understand how astronomers use variations in reflective brightness to
determine the shap... | 4 | [
0.034423828125,
-0.03271484375,
0.0150146484375,
0.000675201416015625,
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-0.0224609375,
0.036865234375,
-0.00885009765625,
-0.043212890625,
-0.02050781... | 557 | 557 | |
Homework Help
Posted by Lisa on Monday, July 22, 2013 at 3:55pm.
Find all solutions in the interval 0 degrees<θ<360 degrees. If rounding necessary, round to the nearest tenth of a degree. 17sec2 θ − 15tanθsecθ − 15 = 0
• Trig - Steve, Monday, July 22, 2013 at 4:52pm
17sec^2θ - 15secθ tanθ - 15 = 0
15secθ t... | 4 | [
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0.0079345703125,
0.0262451171875,
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0.031494140625,
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0.08984375,
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0.007232666015625,
0.0947265625,
0.03564453125,
-0.0220947265625,
0.0191650390625,
... | 558 | 558 | |
Re: st: stset for grouped data
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: stset f... | 5 | [
0.004425048828125,
-0.0220947265625,
0.03564453125,
0.035888671875,
0.07275390625,
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-0.032958984375,
-0.030029296... | 559 | 559 | |
[SOLVED] Solutions of Congruences
November 29th 2008, 07:17 AM #1
Member
Joined
Jul 2008
Posts
119
[SOLVED] Solutions of Congruences
Problem: Find all the solutions of the following congruence:
$3x^5 \equiv 1 ( \mod{23} )$
Since 5 is a primitive root of 23. I constructed an index table modulo 23... | 5 | [
-0.047607421875,
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0.026123046875,
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-0.068359375,
-0.10205078125,
-0... | 560 | 560 | |
calculus help
June 27th 2008, 05:18 AM
tom555
calculus help
hi, i have some questions that i need help with i wondered if anyone could post the answers, here are the questions
1. The distance moved by a car is given by the equation s=3tsquared-5t+2 using differentiation find an equation for the gradient of ... | 4 | [
-0.07958984375,
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0.01055908203125,
0.00188446044921875,
-0.07373046875,
0.00390625,
0.00457763671875,
0.0732... | 561 | 561 | |
finding triangle for given orthocenter
October 13th 2007, 11:29 PM #1
Junior Member
Joined
Oct 2007
Posts
43
finding triangle for given orthocenter
We have a line d and a point A.
We pass a line perpendicular to d passing through A called D.
Let H be any point on D.
Then can we place points B... | 5 | [
-0.08251953125,
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-0.07275390625,
0.0458984375,... | 562 | 562 | |
Modeling Skin Effect
Depak Patel writes:
Why does high-frequency current flow only on the outer surface of a printed-circuit trace?
Magnetic fields cause the behavior you describe. The technical name for this property is the skin effect. It happens in all conductors. If you really like mathematics, the following sec... | 4 | [
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-0.0068359375,... | 563 | 563 | |
Homework Help
Posted by Jo on Monday, December 7, 2009 at 11:30pm.
Naturalists find that the populations of some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forest varies sinusoidally with time. Records started
being kept when t = 0 years. A minimum number, 200 foxes,... | 4 | [
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Homework Help
Posted by AMY on Thursday, July 1, 2010 at 12:09am.
A certain freely failing object requires 1.70 s to travel the last 20.5 m before it hits the ground. From what height above the ground did it fall?
• Physics - drwls, Thursday, July 1, 2010 at 3:15am
Let H be the initial height.
Let T be the... | 4 | [
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0.03466796875,
... | 565 | 565 | |
Physics - check this work for horizontal displacem
Posted by Farah on Sunday, December 5, 2010 at 5:18pm.
A 1.5kg melon is placed on top of the post. A girl lying on the ground fires a 500g arrow at ground level with velocity of 20m/s, 60deg above the horizontal, and hits the melon when the arrow is at
its highest poi... | 5 | [
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0... | 566 | 566 | |
Posts by
Posts by Gary
Total # Posts: 299
maths
A car and a van started from two cities at the same time and travelled towards each other at steady speeds. The car took 4 hours to cover the distance between the two cities and the van took 6 hours.
After what amount of time did they pass each other? 4.
chemistry
If ... | 4 | [
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0.047607421875,
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-0.0419921... | 567 | 567 | |
Homework Help
Posted by Algebra 2 on Thursday, April 2, 2009 at 9:22pm.
thanks for the help earlier I got one more question
X^4-13X^2+36
How do I factor this using algebra not just gussing and checking this times this and what number plus what number gives you these numbers
how do i factor that wihtout playing one ... | 4 | [
0.041748046875,
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0.0250244140625,
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0.04296875,
-0.00701904296875,
0.0147... | 568 | 568 | |
DSolve fails to solve a very simple boundary value problem
GROUPS:
Hi there. I was surprised by the following issue with
DSolve[]
. I solve a simple boundary value problem:
A v''(t)+B v(t) = F(t)
where
A
,
B
-- ... | 4 | [
-0.07177734375,
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-0.07373046875,
-0.08691... | 569 | 569 | |
Surface area plz help me
Find the surface area of the surface of revolution generated by revolving the graph y=x3, 0
The formula for the area of a surface of revolution about the $x$-axis is $<br /> \begin{array}{rcl}<br /> \mbox{surface area}&=&\int_{x_1}^{x_2}2\pi y\,ds\\<br /> &=&2\pi\int_{x_1}^{x_2}y\sqrt{1+\
left... | 4 | [
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0.03955078125,
-0.0810546875,
0.... | 570 | 570 | |
Algebra--help really needed!
Posted by Caroleen on Tuesday, January 6, 2009 at 6:27pm.
I'm having some trouble with my algebra homework. Please walk me through the question completely and give me the answer so I can fully understand it if I would ever need to solve a similar problem.
Here's the problem:
#1: Jon begi... | 4 | [
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-0.0240478515625,... | 571 | 571 | |
Autonomous system
December 15th 2011, 04:18 AM
alexmahone
Autonomous system
Consider the autonomous system
$\frac{dx}{dt}=F(x, y),\ \frac{dy}{dt}=G(x, y)$
in a region where the functions $F$ and $G$ are continuously differentiable.
Suppose that $(x(t), y(t))$ is a solution of the system and that $... | 4 | [
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... | 572 | 572 | |
The diagram on the left shows the uptake of heat by 1 kg of water, as it passes from ice at -50 ºC to steam at temperatures above 100 ºC, affects the temperature of the sample.
A: Rise in temperature as ice absorbs heat.
B: Absorption of heat of fusion.
C: Rise in temperature as liquid water absorbs heat.
D: Water b... | 4 | [
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0.040527343... | 573 | 573 | |
RE: st: Mata looping question
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: st: Mata loo... | 5 | [
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Homework Help
Posted by Lynnese on Wednesday, April 8, 2009 at 5:58pm.
At the animal shelter, 1/3 of the animals are dogs, 2/12 are cats, and 19 are other animals. How many animals are at the shelter?
is the answer 22??
help me please
• math - Reiny, Wednesday, April 8, 2009 at 6:12pm
let the total number of... | 4 | [
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0.031005859375,
-0.037841796875,
0.008911132812... | 575 | 575 | |
Homework Help
Posted by kgosi on Thursday, April 25, 2013 at 11:09am.
A water tank can be constructed with a metal top and two square ends that holds 16 cubic meter of water and requires 40 square meter of metal. find the dimensions of the water tank.
• math - Steve, Thursday, April 25, 2013 at 11:16am
if the ... | 4 | [
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0.0213623... | 576 | 576 | |
The Pythagorean Theorem: Footnote 2
1. After showing people the two proofs of the Pythagorean Theorem, in Theorem 3.4, and after explaining to them that since the distance formula only gives us the Pythagorean Theorem in the case where
the perpendicular sides of the triangle are horizontal and vertical, they would ofte... | 4 | [
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0.11376953... | 577 | 577 | |
Pr
1E-1 : Pressure Measurement Using a Multi-Fluid Manometer 6 pts
The water in a tank is pressurized by air, and the pressure is measured by a multi-fluid manometer, as shown in the figure. Determine th... | 5 | [
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Area to cost based on parimiter
April 21st 2012, 06:54 PM
blondedude092
Area to cost based on parimiter
I have an area A = 2500ft^2 of a rectangular fence
the area is found base * height
the base is X and height is H
Each fence post is $25; meaning $100 for all 4 of them
Only 3 of the sides are ... | 4 | [
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0.03466796875,... | 579 | 579 | |
Area under curve
January 13th 2013, 06:04 AM
Tutu
Area under curve
Hi can you please explain this to me,
For
$\int^k_0 x(x-4)\ dx = 13$, why must k be from 0 to 4 such that the area is 13units^2?
I integrated x(x-4) from 0 to 4, I only got the area as 10.something...it's not 13?
If that is so, ... | 4 | [
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0.01513671875,
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... | 580 | 580 | |
Homework Help
Posted by casidhe on Friday, April 20, 2012 at 11:41pm.
I've posted this question before and think I've made some progress but it some part of the second answer I got is wrong
I've done the first question but I cannot get any farther. I'm so stuck. Please explain or just help me to figure out the next s... | 5 | [
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0.00860595703125,
0.0218505859375,
-0... | 581 | 581 | |
Homework Help
Posted by Leah on Monday, June 11, 2012 at 5:03am.
How would I evaluate these trig functions without using a calculator? U:
sin(-13π/6)
cot 11π/6
cot(-14π/4)
sec 23π/6
Thanks in advance ^^; and if you'd tell me step by step on how to do problems like these I'd be grateful :D
• Math/Trig - Steve, ... | 4 | [
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0.0341796875,
-0.0820... | 582 | 582 | |
Probability and statistics blog
The standard, textbook way to represent a density function looks like this:
Perhaps you have seen this before? (Plot created in R, all source code from this post is included at the end). Not only will you find this plot in statistics books, you’ll also see it in medical
texts, sociology... | 4 | [
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Smallest subring
January 21st 2009, 11:24 AM #1
Smallest subring
Hi guys,
I'm scheduled to see my lecturer about this problem, but he isn't available until next week, and I feel that I am likely to get a clearer explanation here.
This is for a Galois Theory course, and he states the following theorem,
... | 5 | [
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Flow Calculator
Manual Calculations
Gas Flowmeter Sizing
Click Here To Download A Printable Version
Variable area flowmeters suitable for liquid service have a capacity rating based on water at 70° Fahrenheit. Flowmeters suitable
for gas service have a capacity rating based on air at STP (70°F, 14.7 PSIA) conditions... | 5 | [
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Lin.ear th.inking
Permutations are a fundamental concept in discrete mathematics, and crop up in numerous places in computer science. The set of all possible permutations of n items is usually denoted
S[n]
(since the set forms a group which is isomorphic to the Symmetric group of order n). The number of permutations ... | 4 | [
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st: RE: How to improve accuracy in numerical integrations using Stata
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Dat... | 5 | [
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i have no idea what this question is asking (find logarithmic approximations)
November 19th 2009, 08:58 PM #1
Member
Joined
Sep 2009
Posts
105
i have no idea what this question is asking (find logarithmic approximations)
i remember doing something like this last year, but it was just glanced over, and ha... | 4 | [
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Trigonometric Integrals
February 16th 2008, 12:33 PM
thejabronisayz
Trigonometric Integrals
Can anyone help me or give me a good idea of how to approach the definite integral ([sinx]^2)*([cosx]^2) with the limits of integration from 0 to pi/2? I'm pretty sure I should somehow be able to
simplify it using hal... | 5 | [
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Homework Help
Posted by Molly on Friday, July 29, 2011 at 9:58pm.
1. John’s loans for his business total $155,000. One of the loans is a SBA loan at 11% interest; the other loan is a Community Business Partner loan whose interest is 6.5% After one year the loans
accumulated $12,325 in interest. What was the amount of ... | 4 | [
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MathGroup Archive: January 2012 [00145]
[Date Index] [Thread Index] [Author Index]
Re: How to plot divergence of gradient as contour
• To: mathgroup at smc.vnet.net
• Subject: [mg124067] Re: How to plot divergence of gradient as contour... | 5 | [
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Homework Help
Posted by Anonymous on Tuesday, January 29, 2013 at 11:10pm.
find the volume of the solid generated by revolving around the x-axis: y=e^(x-8), y=0, x=0, x=10
So I know you can use the washer method, but the shell method can also be used and it should be better. The issue is I'm not certain how to actual... | 5 | [
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Posts by
Posts by Rudy
Total # Posts: 50
spanish
Each of the Spanish sentences below is incorrect in either grammar or meaning. Rewrite each sentence correctly. 1. El rey que canta está tocando el tambor. The king that used to sing is playing the
drum. 2. Él y ella está tomando jugo. He and she are drink...
account... | 4 | [
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Why does a group action on a scheme induce a group action on cohomology?
up vote 6 down vote favorite
2
This is probably totally obvious but I have no clue how this is done: Say you have an endomorphism $f:X \rightarrow X$ of schemes. Why (if true, perhaps some additional assumptions are necessary!) do
you get for a Z... | 4 | [
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Change of coordinate proof
November 4th 2008, 06:51 PM #1
MHF Contributor
Joined
Oct 2005
From
Earth
Posts
1,599
Change of coordinate proof
Let V be a finite-dimensional vector space over F, and let $B=(x_1 , ...x_{n})$ be an ordered basis for V. Let Q be an n by n invertible matrix with entries from... | 4 | [
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Math - logs
Number of results: 90,255
Math
Logs are stacked up in apile as shown in the figure. The top row has 15 logs and the bottom row has 21 logs. How many logs are in the stack? a1= 1+14=15 an= 7+14=21 s1=(n/2)(a1+an) (n/2)(15+21) = 18
How do I figure out the n?
May 4, 2010 by Abbey(Please help)
math - natural ... | 4 | [
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Limits and inverse trig functions
November 8th 2012, 10:08 AM
tonykart44
Limits and inverse trig functions
Hi everyone,
I'm currently studying for my calculus test tommorow and I have some problems which I have no clue how to solve. One problem is a limit and the other one is about inverse trig functions.
... | 5 | [
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Please help with Trig equation sin(x) = -1/2
March 16th 2006, 02:57 PM #1
hunisukl
Guest
Please help with Trig equation sin(x) = -1/2
I can not figure out how to work this problem, can any one help???
sin(x) = -1/2
I would appreciate any help. Thanks!
hunisukl
I can not figure out how to work t... | 4 | [
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equilateral triangle inscribed in a circle..
February 28th 2010, 07:02 AM #1
Member
Joined
Mar 2009
From
jharkhand
Posts
77
equilateral triangle inscribed in a circle..
In the given fig., ABC is an equilateral triangle inscribed in a circle of radius 4 cm. Find the area of the shaded region.
Hi ... | 4 | [
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