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Homework Help: Fourier series coefficients

  1. Jan 18, 2014 #1
    1. The problem statement, all variables and given/known data

    x(t) = 4 for 0 <x<1 and 0 otherwise and this process repeats for all values including negative.

    find X_0 and X_n

    and find the first 6th harmonics of the fourier series in cosine form

    2. Relevant equations

    3. The attempt at a solution

    x_0 = 4/3

    x_n = (4/3)*exp(-i*n*(pi/3)) *sinc(n/3)

    To find the first 6th harmonics in cosine form do I just use the X_n and plug the values in? Do I have to put it literally in cosine instead of sine or do they mean cos/sin form?
  2. jcsd
  3. Jan 20, 2014 #2


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    Could you please give us the problem statement exactly as given to you? You seem to be leaving out relevant details, like what the period of x(t) is supposed to be.
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