Results 1 to 5 of 5

- November 16th 2009, 01:42 PM #1

- Joined
- Nov 2008
- Posts
- 1,401

## furie question..

http://i33.tinypic.com/35bsb5t.jpg

i opened the integral on 0 till pi/2 interval

f(x)sin(nx)cos(x/2)dx

which is a coefficient of a foorie series

in order to find a coefficient we do <f,e_i>

where e_i is the orthonormal vector

i cant see how its a coefficient

??

its has 3 function in it so it doesnt resemble a coefficient formulla

???

- November 16th 2009, 03:00 PM #2

- November 16th 2009, 09:11 PM #3

- Joined
- Nov 2008
- Posts
- 1,401

- November 17th 2009, 03:24 AM #4

- Joined
- Apr 2005
- Posts
- 17,908
- Thanks
- 2328

- November 17th 2009, 03:40 AM #5

- Joined
- Nov 2008
- Posts
- 1,401

it means that there are first order disscontinuations on the graph of the function

i was told that because it is defined from 0 to pi we can write it as odd or ever function

when we open the sine we break it into two intergals

and each one is a foorier coeffient which goes to zero

but my prof said that its not a proof