I have a full wave rectified sine wave. Basically, the graph looks like abs(sinx). When calculating the coefficients, i have tried evaluating: ∫[sin(t)exp(-jnt)]dt from 0 to pi. and am not getting the correct answer. I'm wondering if i need to just look for a computation error... or if I am setting the problem up wrong. I'm having doubts about if i'm allowed to setup the integral as such. Thanks.