GJ Consider S9wn ce x[n]-Cos(Fn) the e. a

Question

Question

Answer 1

Answer #1

please comment if more explanation is needed

a)I have done this in Matlab i am attaching the code and the generated figure

code:

n=linspace(0,19,20);
x=cos(pi*n/5);
X=fft(x);
stem(abs(X));xlabel('k');ylabel('X[k]');

Figure:

5 0 0 4 2

b)

according to the defenition of DFT we are given the case that N=20 here.

Answer 2

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