A continuous-time signal x(t)=cos(2πt) is sampled every T seconds, resulting in a discrete-time signal x[n] = x(nT) . Determine whether the sampled signal is periodic and if the signal is periodic, determine the number of samples in the fundamental period.
(a) T=0.125 sec. (b) T=5 sec. (c) T=4/3 sec.