Q1) Determine whether the following signals are periodic or not. If periodic, specify the fundamental period and frequency in Hz. a) x(t)=cos^2(2pi t) b) x(t)=cos(t)+sin(2pi t) c) x(t)=e^sint

a) The signal is periodic. The fundamental period is second, and the frequency is Hz.b) The signal is periodic. The fundamental period is seconds, and the frequency is Hz.c) The signal is not periodic.