A triangular wave is represented by f(x)= { -x, 0 < x <π -< x <0 (c) Plot f(x) using the first three (3) terms of its Fourier series representation.

Find two fourier expansions for the function h(r) = sin(x). In one expansion, all the sine terms should have zero as their coefficient. In the other expansion, all the cosine terms should have zero as their coefficient.