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?