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1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:18:11
what i get is 3/8 + 1/2cos(2at) + 1/8cos(4at)
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:18:45
but im supposed to have 5/16 + 5/8cos(2at) + 1/16cos(4at)
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
334,482,942,506,041,340
Zybikron
03/28/2022 12:19:03
what did you do?
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:19:23
so i first expanded it to: [1/2 + 1/2cos(2at)]^2
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:19:30
squared this expression
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:19:52
then got 1/4 + 1/2cos(2at) + 1/4cos^2(2at)
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:20:00
then expanded the cos^2 again
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
334,482,942,506,041,340
Zybikron
03/28/2022 12:21:38
and got?
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:21:48
3/8 + 1/2cos(2at) + 1/8cos(4at)
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
334,482,942,506,041,340
Zybikron
03/28/2022 12:23:53
~~,w expand 1/4(1/2+1/2cos(4at))^2~~
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:24:41
how come there is a square to that expression?
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
334,482,942,506,041,340
Zybikron
03/28/2022 12:24:42
well that didn't give me what I wanted
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
334,482,942,506,041,340
Zybikron
03/28/2022 12:25:16
ah, my bad, looked at the wrong thing
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:25:48
im honestly not sure if my prof made a mistake
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:26:01
or if i keep making the same mistake that doesnt make our answers match up
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
334,482,942,506,041,340
Zybikron
03/28/2022 12:27:40
yeah, Seems like they made a mistake
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
220,517,274,845,577,200
ramonov
03/28/2022 12:28:59
,w cos^4(at) = 3/8 + 1/2cos(2at) + 1/8cos(4at)
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
510,789,298,321,096,700
TeXit
03/28/2022 12:29:03
Results provided by WolframAlpha
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:30:03
ok I think this clears it up more, thanks!
0
1
null
null
null
null
null
1,542
help-10
5cd8829e5d9643009742ddb2b9253fd6
711,720,510,202,839,200
Zoro
03/28/2022 12:30:08
.close
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 12:33:57
i need some help with differential forms, could someone check what step is wrong here?
https://cdn.discordapp.c…636095518/dw.png
dw.png
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 12:34:13
I know the last one is wrong because it doesnt hold $$\varphi^* (d \sigma)=d(\varphi^*\sigma)$$
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 12:34:16
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 12:34:25
but i dont know where my mistake is
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 12:34:44
sorry this is already taken
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
461,332,947,778,142,200
PVT Rijal
03/28/2022 12:35:13
Mb
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 12:35:47
Under 2
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 12:36:09
did i do the wedge product wrong?
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 12:36:18
x_2 sin(x_2) not x_2
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 12:36:59
Just you forgot sin(x_2)
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 12:37:15
in the last term right?
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 12:37:59
Yeah the coefficient or the second term of the right hand side under 2
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 12:42:34
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 12:43:12
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 12:44:32
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 12:45:02
so there is again something wrong
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 12:51:08
@Cogwheels of the mind
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:03:20
I calculated φ*σ and I got
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:05:26
$cos(x_{3}x_{4})dx_{1}Λdx_{2}Λdx_{4}-x_{2}sin(x_{2})(x_{4}dx_{1}Λdx_{2}Λdx_{3}+x_{3}dx_{1}Λdx_{2}Λdx_{4})$
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:05:53
**Cogwheels of the mind**
https://cdn.discordapp.c…983413366824.png
826318983413366824.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:06:43
So you are right
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:06:46
how do the $x_3,x_4$ get there in the last term?
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:06:48
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:06:57
I got same d(φ*σ) with you
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:08:04
Just the Jacobi matrix is $\begin{pmatrix}1&0&0&0\\0&1&0&0\\0&0&x_{4}&x_{3}\\0&0&0&1\end{pmatrix}$
0
1
461,332,947,778,142,200
PVT Rijal
7798
PVT Rijal
false
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:08:07
**Cogwheels of the mind**
https://cdn.discordapp.c…983413366824.png
826318983413366824.png
0
1
511,209,824,470,564,860
Enoo58
9243
Enoo58
false
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:08:19
They appear in the third row
0
1
511,209,824,470,564,860
Enoo58
9243
Enoo58
false
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:08:50
ah i see
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:09:01
yeah but still we should have this equality
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:09:08
$$\varphi^* (d \sigma)=d(\varphi^*\sigma)$$
1
0
511,209,824,470,564,860
Enoo58
9243
Enoo58
false
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:09:11
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:09:37
i see it now i think
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:10:06
we get the x4 term just like before if we do the LHS
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:10:13
I got this
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:10:27
I calculated mine , they equal
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:10:51
Your dσ is correct
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:10:59
Now φ* it
0
1
826,318,983,413,366,800
Cogwheels of the mind
9367
Cogwheels of the mind
false
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:11:07
alright i think im having trouble with properly using $\varphi^*$
1
0
511,209,824,470,564,860
Enoo58
9243
Enoo58
false
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:11:09
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:11:22
i thougt i just have to exchange the coordinates
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:11:33
No it’s
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:16:09
$ω=f(y_{1},…,y_{n})dy_{j_{1}}Λ…Λdy_{j_{r}}$, then $φ*ω=\sum_{i_{1},…,i_{r}} f(φ(x_{1},…,x_{n}))\frac{\partial (y_{j_{1}},…,y_{j_{r}})}{\partial (x_{i_{1}},…,x_{i_{r}})} dx_{i_{1}}Λ…Λdx_{i_{r}}$
0
1
510,789,298,321,096,700
TeXit
0796
TeXit
true
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:20:26
ah so you calculated the jacobian to get the $\frac{\partial (y{j{1}},…,y{j{r}})}{\partial (x{i{1}},…,x{i{r}})}$ term
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:20:28
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:21:05
**Cogwheels of the mind**
https://cdn.discordapp.c…983413366824.png
826318983413366824.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:21:24
Yeah jacobian term
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:23:26
and only of those where we have the corresponding $dx_n$ term right?
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:23:29
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:24:21
Idk, just calculate by definition
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:25:03
for example here the ferst term uses derivatives $x_1,x_2,x_4$ but they are all 1 so nothing happens
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
510,789,298,321,096,700
TeXit
03/28/2022 13:25:05
**Enoo58**
https://cdn.discordapp.c…824470564865.png
511209824470564865.png
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:26:02
Just the first and second the fourth rows and choose three columns
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:26:07
Calculate the determinant
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:26:48
Only none zero terms are we choose columns 1,2,4 or columns 1,2,3
0
1
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:27:31
alright got it
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:27:37
thank you very much
1
0
null
null
null
null
null
1,543
help-10
f1896c75908a461f9c81d084624b65d4
511,209,824,470,564,860
Enoo58
03/28/2022 13:28:01
do you know a source where i can read more about it ?
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 13:49:36
Hey can someone help me?
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 13:49:40
https://cdn.discordapp.c…20328_204908.jpg
IMG_20220328_204908.jpg
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 13:50:28
solve in R the equation, where a is the real parameter
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:55:42
It’s a quadratic function of 6^|x|
0
1
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 13:56:21
Yes
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 13:57:09
you can note 6 ^ (x) = t
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:58:35
Yeah then you just solve it for different cases, a<0,0<=a<1,a>=1
0
1
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 13:59:08
And thats all?
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 13:59:33
Yeah
0
1
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 13:59:41
Ok thank you
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 14:01:42
But how to solve equation for this cases?
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 14:02:29
the teacher didn't teach us that
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 14:02:39
I dont know how
1
0
510,789,298,321,096,700
TeXit
0796
TeXit
true
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 14:30:57
?
0
1
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 14:30:59
What ?
0
1
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
826,318,983,413,366,800
Cogwheels of the mind
03/28/2022 14:31:09
You don’t know how to solve quadratic function?
0
1
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 14:35:04
I know that
1
0
null
null
null
null
null
1,544
help-10
79b243d9b5c541cca0d4a28d9f596e12
691,737,558,857,547,800
Namikaze
03/28/2022 14:35:32
Never mind
1
0
null
null
null
null
null
1,545
help-10
7a185fb2e0534d288b67c1d9c57a5f1d
228,672,475,343,355,900
fireflanger!
03/28/2022 15:50:12
yo yo
1
0
null
null
null
null
null
1,545
help-10
7a185fb2e0534d288b67c1d9c57a5f1d
228,672,475,343,355,900
fireflanger!
03/28/2022 15:50:20
ok so this probably shouldnt be too long
1
0
null
null
null
null
null
1,545
help-10
7a185fb2e0534d288b67c1d9c57a5f1d
228,672,475,343,355,900
fireflanger!
03/28/2022 15:50:36
i have x^3 - 1 = f(x)
1
0
null
null
null
null
null
1,545
help-10
7a185fb2e0534d288b67c1d9c57a5f1d
228,672,475,343,355,900
fireflanger!
03/28/2022 15:50:45
or f(x) = x^3 - 1
1
0
null
null
null
null
null
1,545
help-10
7a185fb2e0534d288b67c1d9c57a5f1d
228,672,475,343,355,900
fireflanger!
03/28/2022 15:50:52
and i need to find the complex zeros of it
1
0
null
null
null
null
null