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9.2 For the discrete-time periodic signal x[n] (a) Determine its fundamental period No. (b) Suppose we sample the continuous-time signal x(t) = cos (?t) with a sampling period T = 0.7. Is the Nyquist sampling condi- tions satisfied? How does the sampled signal compare to x[n]? (c) Under what conditions would sampling a continuous-time signal x(t) = cos (?t) give a discrete-time sinusoid x[n] that resembles x(t)? Explain and give an example. = cos (0.7??),

.2 For the discrete-time periodic signal $x[n]=cos(0.7?n)$, (a) Determine its fundamental period $N_{0}$. (b) Suppose we sample the continuous-time signal $x(t)=cos(?t)$ with a sampling period $T_{s}=0.7$. Is the Nyquist sampling conditions satisfied?How does the sampled signal compare to $x[n]$ ? (c) Under what conditions would sampling a continuous-time signal $x(t)=cos(?t)$ give a discrete-time sinusoid $x[n]$ that resembles $x(t)$ ? Explain and give an example.

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