Question

3 Sampling (10 pts) The sequence x[n]=\cos \left(\frac{\pi}{4} n\right) \quad-\infty<n<\infty was obtained by sampling the continuous-time signal x_{c}(t)=\cos \left(\Omega_{0} t\right) \quad-\infty<t<\infty at a sampling rate of 1000 samples/sec. What is a possible value of No that could haveresulted in x[n]? Sampling The signal x_{c}(t)=\sin (2 \pi(100) t) was sampled with sampling T = 1/400 second to obtain a discrete-time signal x[n]. Whatis the resulting sequence x[n]?

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