3.1. A continuous-time periodic signal x(t) is real valued and has a fundamental period

T = 8. The nonzero Fourier series coefficients for x(1) are

a₁ = a_₁ = 2, a3 = a_3 = 4j.

Express x() in the form

x(t) =

Σ A. cos(w;! + Φι).

k=0