Q.5 A continuous-time periodic signal x (t) is real

valued and has a fundamental period T = 4. The

nonzero Fourier series coefficients for x (t) are

X [2] = X [-2] = 2, X [3] = X*[−3] = 4j

Express x (t) in the form

x (t) = Σ0 Ak cos(@kt + Pk).