Find the Fourier series of the given function f(x), which is assumed to have the period 2π. Show the details of your work. Sketch or graph the partial sums up to that including cos 5x and sin 5x.

f(x) in prob. 6

Data from Prob. 6

Sketch or graph f(x) which for -π < x < π is given as follows.

f(x) = |x|