4. Define a periodic function f (x) as follows: 3 -3

4. Define a periodic function f (x) as follows: {3 f (x) = f (x + 6) Vx Let the Fourier Series of f (x) be given by g(x) = ao + cos x bn sinex)]. Compute the value of g (3). Hint: f (x) is discontinuous at x = 3.