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Homework Help: Fourier transform answers

  1. Jul 29, 2012 #1
    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. jcsd
  3. Jul 31, 2012 #2


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

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