Construct the first three Fourier approximations to the square wave function f(x) = { -1, -T < x < 0; 0, 0 < x < T.
F1(x) = -A/pi*sin(x)
F2(x) = -A/(pi*3)*sin(3x)
F3(x) = -A/(pi*5)*sin(5x)
Using a calculator, graph the function and the first three Fourier approximations to see how the approximation matches the function f(x).
Note: You can earn partial credit on this problem.