What is the discrete time signal obtained after sampling of the analog signal, xa(t) = 3 cos 100 πt. Assume that the signal is sampled at the rate of Fs = 75 Hz.
1
\(3\cos \frac{{4\pi }}{3}n\)
2
\(3\cos \frac{{2\pi }}{3}n\)
3
\(3\cos \frac{\pi }{3}n\)
4
3 cos πn