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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:20:26
I’m having trouble with the domain intervals
1
0
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help-10
6406cb69522c4c4e929cbe08f90d841b
200,013,547,491,688,450
a disappointing son
04/10/2022 21:21:50
sin(x) is not equal to 1 at x=0
0
1
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null
null
null
null
1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:22:32
where
1
0
392,341,051,794,391,040
Navix
0001
nvx
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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:23:14
no. i added 1 to the other side
1
0
null
null
null
null
null
1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:23:27
thats where i got sin(x) = 1
1
0
null
null
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null
null
1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:23:39
your answers for when sin(x) = -1/2 are fine, but you don't need the +(2 pi k) because only for k=0 will those values be in the interval [0, 2pi)
0
1
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null
null
null
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help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:24:10
ik i didn't include it. i just wrote it as a habit
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0
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help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:24:26
i don't understand what is happening starting at the line with the 2*sqrt(3), where did that come from?
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1
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help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:24:28
look more to the right under the graph. those are my solutions
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help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:24:38
that's another problem dont mind it
1
0
536,197,466,261,946,400
Prem
1183
Prem
false
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help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:25:03
i see
0
1
null
null
null
null
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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:25:12
well as @a disappointing son said, x=0 is not a solution
0
1
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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:25:17
the other three are fine
0
1
null
null
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null
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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:25:31
is that my only mistake?
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0
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help-10
6406cb69522c4c4e929cbe08f90d841b
200,013,547,491,688,450
a disappointing son
04/10/2022 21:25:44
~~the x=0 solution needs to be replaced with a correct solution~~
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help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:26:00
i don't really get the [0, 2pi). I thought it should include 0
1
0
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null
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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:26:17
there is only one correct solution for sin(x) = 1 in that interval, no?
0
1
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help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:26:33
pi/2?
1
0
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help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:26:37
right
0
1
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help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:26:43
which is already listed
0
1
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null
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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:26:52
but sin(0) is not 1, so x=0 is not a solution
0
1
null
null
null
null
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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:27:07
(it's not a solution to 2sin(x) + 1 = 0 either)
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1
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null
null
null
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1,809
help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:27:43
so just get rid of 0 from my list of solutions?
1
0
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help-10
6406cb69522c4c4e929cbe08f90d841b
761,155,030,513,352,700
Bungo
04/10/2022 21:31:14
correct
0
1
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null
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help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:33:48
alr thanks for the help
1
0
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help-10
6406cb69522c4c4e929cbe08f90d841b
610,937,873,981,636,600
Brotally
04/10/2022 21:33:50
.close
1
0
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help-10
056522f1989a4cbbb4c70212be85487a
489,441,898,797,203,460
mish
04/10/2022 21:48:44
is the 8 positive in this equation: -3 - 8
1
0
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help-10
056522f1989a4cbbb4c70212be85487a
892,725,065,127,444,500
hellblaze_skyfire
04/10/2022 21:49:31
?
0
1
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help-10
056522f1989a4cbbb4c70212be85487a
892,725,065,127,444,500
hellblaze_skyfire
04/10/2022 21:49:33
you mean -3-8
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help-10
056522f1989a4cbbb4c70212be85487a
690,136,519,331,414,000
阿皮pea
04/10/2022 21:50:09
i think so
0
1
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help-10
056522f1989a4cbbb4c70212be85487a
200,013,547,491,688,450
a disappointing son
04/10/2022 21:50:25
why would it be positive
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1
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help-10
056522f1989a4cbbb4c70212be85487a
690,136,519,331,414,000
阿皮pea
04/10/2022 21:50:40
uh
0
1
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help-10
056522f1989a4cbbb4c70212be85487a
489,441,898,797,203,460
mish
04/10/2022 21:50:46
no theres space between the minus sign and 8
1
0
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help-10
056522f1989a4cbbb4c70212be85487a
200,013,547,491,688,450
a disappointing son
04/10/2022 21:50:57
it's the same thing
0
1
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help-10
056522f1989a4cbbb4c70212be85487a
892,725,065,127,444,500
hellblaze_skyfire
04/10/2022 21:51:00
exactly
0
1
200,013,547,491,688,450
a disappointing son
0540
a disappointing son
false
1,810
help-10
056522f1989a4cbbb4c70212be85487a
200,013,547,491,688,450
a disappointing son
04/10/2022 21:51:03
whitespace doesn't matter
0
1
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help-10
056522f1989a4cbbb4c70212be85487a
892,725,065,127,444,500
hellblaze_skyfire
04/10/2022 21:51:07
you can read it as -3+(-8)
0
1
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null
null
null
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1,810
help-10
056522f1989a4cbbb4c70212be85487a
489,441,898,797,203,460
mish
04/10/2022 21:51:08
ohh
1
0
null
null
null
null
null
1,810
help-10
056522f1989a4cbbb4c70212be85487a
690,136,519,331,414,000
阿皮pea
04/10/2022 21:51:10
-3+(-8)
0
1
null
null
null
null
null
1,810
help-10
056522f1989a4cbbb4c70212be85487a
892,725,065,127,444,500
hellblaze_skyfire
04/10/2022 21:51:11
which makes 8 a negative
0
1
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1,810
help-10
056522f1989a4cbbb4c70212be85487a
489,441,898,797,203,460
mish
04/10/2022 21:51:20
thanks
1
0
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help-10
056522f1989a4cbbb4c70212be85487a
690,136,519,331,414,000
阿皮pea
04/10/2022 21:51:21
yeah
0
1
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help-10
056522f1989a4cbbb4c70212be85487a
200,013,547,491,688,450
a disappointing son
04/10/2022 21:51:27
don't just tell people answers :/
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1,810
help-10
056522f1989a4cbbb4c70212be85487a
489,441,898,797,203,460
mish
04/10/2022 21:51:27
.close
1
0
null
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1,811
help-10
0688e2064d2a49669b36b1dba85071cc
832,031,292,106,997,800
beginner
04/10/2022 22:03:42
how can i make an implicit equation for 3 dimensions out of 2 points?
1
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1,811
help-10
0688e2064d2a49669b36b1dba85071cc
832,031,292,106,997,800
beginner
04/10/2022 22:04:33
i know the vectorial form for a plane in 3 dimensions is something like t(a,b,c) + s(d,e,f) + P where P is a point
1
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help-10
0688e2064d2a49669b36b1dba85071cc
832,031,292,106,997,800
beginner
04/10/2022 22:06:02
so, if i have these two points P=(-2,3,4) and Q=(-1,3,1) i could maybe start from one of these two points, say, P a,d build something like t(a,b,c) + s(d,e,f) + (-2,3,4)
1
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help-10
0688e2064d2a49669b36b1dba85071cc
832,031,292,106,997,800
beginner
04/10/2022 22:06:34
but how could i find the scalars t and s and the directors (a,b,c) and (d,e,f)?
1
0
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help-10
0688e2064d2a49669b36b1dba85071cc
832,031,292,106,997,800
beginner
04/10/2022 22:07:01
if it was in 2-d i could just calculate the slope and it would be easy but i don't think there's such thing as slope for 3d
1
0
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help-10
0688e2064d2a49669b36b1dba85071cc
832,031,292,106,997,800
beginner
04/10/2022 22:27:25
.close
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:33:50
https://cdn.discordapp.c…100/IMG_7623.jpg
IMG_7623.jpg
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:34:47
given that cosB=5/9, how'd i get sinB
1
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:36:05
is it possible to get the value of sinB with all the information on this picture
1
0
489,441,898,797,203,460
mish
5886
mish
false
1,812
help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:39:32
the final goal is the area of triangle ABC
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:39:52
and i know heron's formula could be very useful in this case
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:40:08
but i want to do it another way
1
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hellblaze_skyfire
5795
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1,812
help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:40:45
the area will also be (1/2) * 6 * 3 * sinB
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:41:44
in order to get the answer, i have to get the sinB
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:41:51
do you guys have any idea about sinB
1
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help-10
1d0057732b4f4fa6bb95f41951fabadc
312,378,253,455,130,600
Scrittles
04/10/2022 22:42:25
could you do reverse sinB to find the angle of B
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help-10
1d0057732b4f4fa6bb95f41951fabadc
312,378,253,455,130,600
Scrittles
04/10/2022 22:43:23
angle B would be 56.4427 degrees
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help-10
1d0057732b4f4fa6bb95f41951fabadc
328,019,240,898,789,400
dino dik
04/10/2022 22:48:42
can you recall an identity linking sin and cos?
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:49:13
sin^2+cos^2=1
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
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dino dik
04/10/2022 22:49:27
nice, that would work
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:49:58
how'd you get angle B would be 56.4427 degrees?
1
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:50:30
that sounds fantastic, let me try
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
312,378,253,455,130,600
Scrittles
04/10/2022 22:51:13
I did sin^-1(5/6) but I realized thats not a right triangle so im wrong
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:52:10
it does looks like a right triangle tho, even its not
1
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1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:55:01
5/9=(5^2/9^2) right
1
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help-10
1d0057732b4f4fa6bb95f41951fabadc
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dino dik
04/10/2022 22:55:34
5/9 = 25/81?
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help-10
1d0057732b4f4fa6bb95f41951fabadc
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dackid
04/10/2022 22:56:01
They like to trick ya like that
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:56:12
(5 * 5)/(9 * 9)
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:56:28
you cancel out those 9 and 5 on both denominator and numerator
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:56:32
then you get 5/9
1
0
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help-10
1d0057732b4f4fa6bb95f41951fabadc
178,716,199,989,936,130
dackid
04/10/2022 22:56:39
No
0
1
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help-10
1d0057732b4f4fa6bb95f41951fabadc
178,716,199,989,936,130
dackid
04/10/2022 22:56:52
That equality is false
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:57:12
cuz i have to multiply those first right?
1
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help-10
1d0057732b4f4fa6bb95f41951fabadc
328,019,240,898,789,400
dino dik
04/10/2022 22:57:12
yup, I was verifying if that was what @PB meant
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help-10
1d0057732b4f4fa6bb95f41951fabadc
178,716,199,989,936,130
dackid
04/10/2022 22:57:20
And no, that logic is wrong Grammar
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help-10
1d0057732b4f4fa6bb95f41951fabadc
328,019,240,898,789,400
dino dik
04/10/2022 22:58:26
the 9 and the 5 can't be cancelled out like that
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help-10
1d0057732b4f4fa6bb95f41951fabadc
178,716,199,989,936,130
dackid
04/10/2022 22:58:31
Sounds like dino's got this. I'll leave y'all be
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help-10
1d0057732b4f4fa6bb95f41951fabadc
328,019,240,898,789,400
dino dik
04/10/2022 22:58:46
if that were the case, does 1/2 = (1^2)/(2^2)?
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:58:55
no
1
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help-10
1d0057732b4f4fa6bb95f41951fabadc
328,019,240,898,789,400
dino dik
04/10/2022 22:59:26
you can only cancel out factors that are present in both the numerator and denominator
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 22:59:36
i think i got it, i have to follow the calculation rule
1
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708,594,064,060,055,600
PB
4429
Please Correct My Grammar
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 23:05:36
i think the question is solved
1
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328,019,240,898,789,400
dino dik
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 23:05:57
i have found either the sinB's value or the area of the triangle
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 23:06:00
thank you guys
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312,378,253,455,130,600
Scrittles
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Scrittles
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help-10
1d0057732b4f4fa6bb95f41951fabadc
708,594,064,060,055,600
PB
04/10/2022 23:06:27
.close
1
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328,019,240,898,789,400
dino dik
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dino
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help-10
0c14e13593fb4cf4a5e0a2091325234e
468,830,761,261,203,460
Ryuzaki
11/12/2021 11:48:46
**Left as an exercise to the reader**
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help-10
0c14e13593fb4cf4a5e0a2091325234e
356,939,641,485,787,140
BOSS.cYn
11/12/2021 14:02:31
Could somone walk me through the steps to prove this?
https://cdn.discordapp.c…t_1.01.12_PM.png
Screen_Shot_2021-11-12_at_1.01.12_PM.png
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help-10
0c14e13593fb4cf4a5e0a2091325234e
653,715,253,925,773,300
keepitalphanumeric
11/12/2021 14:07:29
What have you tried to do in order to prove this?
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help-10
0c14e13593fb4cf4a5e0a2091325234e
356,939,641,485,787,140
BOSS.cYn
11/12/2021 14:08:34
first I broke up the top part of the left side of the equation to get (sin^2x - cos^2x)(sin^2x + cos^2x)
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help-10
0c14e13593fb4cf4a5e0a2091325234e
356,939,641,485,787,140
BOSS.cYn
11/12/2021 14:09:07
Then used the pythagorean Idenities to get 1 for both of them
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help-10
0c14e13593fb4cf4a5e0a2091325234e
653,715,253,925,773,300
keepitalphanumeric
11/12/2021 14:09:14
Both!?
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help-10
0c14e13593fb4cf4a5e0a2091325234e
356,939,641,485,787,140
BOSS.cYn
11/12/2021 14:09:16
which i think is where Im wrong
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help-10
0c14e13593fb4cf4a5e0a2091325234e
356,939,641,485,787,140
BOSS.cYn
11/12/2021 14:09:30
yep I figured I was wrong
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help-10
0c14e13593fb4cf4a5e0a2091325234e
653,715,253,925,773,300
keepitalphanumeric
11/12/2021 14:10:10
You are in the right direction. But which one can be eliminated by the pythagorean identity?
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328,019,240,898,789,400
dino dik
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dino
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help-10
0c14e13593fb4cf4a5e0a2091325234e
356,939,641,485,787,140
BOSS.cYn
11/12/2021 14:10:33
the one that adds sin and cos squared?
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1
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help-10
0c14e13593fb4cf4a5e0a2091325234e
653,715,253,925,773,300
keepitalphanumeric
11/12/2021 14:10:53
Good. Now, what else can be done to conclude your proof?
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