# Finding sums using Fourier

1. Apr 7, 2008

### metalbec

This is a general question, I guess. If I am given an infinite series, how do I go about finding its sum using Fourier expansion?

2. Apr 7, 2008

### quasar987

You find a function such that when expanded in a fourier series and then evaluated at a certain point coincide with the numerical series.