# Fourier transform answers

1. Jul 29, 2012

### Toyona10

Hi guys~

I have got a few things about some fourier transform Q/A that i wanted to check...so here you go:

1) Find the fourier sine and cosine transform of f(x)=x 0<x<3

ok, for the sine, i get -9/n∏ but i get zero for cosine part, is it wrong?

and the second one:

find the fourier transform of f(x)=x^2 -2<x<2

i know that we use the exponential (e^-inx) here and the answer i get is almost right but its just that i get 'i's along with my answer. How do i correct that??

thanks in advance~

Last edited: Jul 29, 2012
2. Jul 31, 2012

### vela

Staff Emeritus
Yes, it's wrong. Show your work so we can see where you went astray.

Do your algebra correctly. Again, you need to show your work.

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