Consider the finite duration signal x(n) =(0.9)ncos(0.1πn) for 0 ≤ n ≤ 31. Using MATLAB:
a.) Plot the signal
b.) Plot the real part of the DFT of x(n), the imaginary part ofthe DFT of x(n) and the DCT of x(n). All transforms are length N =32.
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