fourier series, please help!!! 1. The problem statement, all variables and given/known data Find the fourier series of f(x)=(sin x)^2. 2. Relevant equations 3. The attempt at a solution I know that I need to use the double angle formulas for this problem: (sin x)^2=1/2-1/2(cos 2x) but I do not know where to go from here.