>>>>> "Michael" == Michael Carey <mpc201 at bigpond.com> writes: Michael> How do I compute the Fourier series for f(x) = { 0, (-pi/2,0) cosx Michael> (0,pi/2)) I do not understand your notation. What does that mean? Are you saying that f(x) is 0 for -pi/2<x<0 and cos(x) for 0 < x < pi/2? Ray