1. The problem statement, all variables and given/known data If I'm given a potential say A(x/a-m) m an integer, (this is the sawtooth wave) What kind of trial function should I use to approximate this? 2. Relevant equations 3. The attempt at a solution I do recall this function arising in Fourier series. Should I actually solve for the Fourier coefficients to get a trig function? Maybe I'm making this more complicated, is there a simpler way to do this?