1. The problem statement, all variables and given/known data So, on a Fourier Series problem I came up with 2/3 + (8/π2)∑(1/n2)(-1)ncos(nπx/2) I'm supposed to Plot sm(x) versus x for m= 5, 10, 20 (m is the index of the summation, which starts at m=1) 2. Relevant equations meh 3. The attempt at a solution The problem is that I don't have a computer program to do this. So I was wondering if someone could give me a link to a site that would do this.