Hi I'm really struggling to make a start on a maths assignment i've been given and I hope somebody on here could help to get me going. The assignment is construct a full-wave rectified cosine wave on mathcad then pass it through a series of filters to see how the waveform changes. I just don't know how to determine a Fourier series for the waveform when all I have to start with is frequency=1500Hz. Any help would be appreciated.