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Homework Help: How to approach this question

  1. Feb 1, 2012 #1
    1. The problem statement, all variables and given/known data

    Given this one period graph of a function with period 2pi,


    find a fourier expansion.

    2. Relevant equations

    3. The attempt at a solution

    So I was wondering if i can split up the integrals into two parts to find the coefficients. It is an even function so ak = 0.

    for bk can I split the integral as follows

    1/pi[int 0 to pi (x cos kx dx) + int pi to 2pi ((-x+2pi) cos kx dx]

  2. jcsd
  3. Feb 1, 2012 #2


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    Staff Emeritus
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    Yup, that's what you're supposed to do. Also, remember a0 isn't equal to 0.
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