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If x(n)=cosω0n and W(ω) is the Fourier transform of the rectangular signal w(n), then what is the Fourier transform of the signal x(n).w(n)? b) 1/2 c) d)

If x(n)=cosω0n and W(ω) is the Fourier transform of the rectangular signal w(n), then what is the Fourier transform of the signal x(n).w(n)? b) 1/2 c) d) Correct Answer W(ω-ω0)- W(ω+ω0)

According to the exponential properties of Fourier transform, we get Fourier transform of x(n).w(n)= 1/2

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