Choose a partial Fourier series approximation pn(t) for f (t). Then plot pn(t) and f (t) on the same graph. Compute the error f pn. Plot the power spectrum for f . Compute the root mean square f of f . Does this Fourier series converge for t = j where j is an integer, and if so what does it converge to; see the Dirichlet convergence Theorem 2.1.4