If x(n)=cosω0n and W(ω) is the Fourier transform of the rectangular – McqOptions

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1.	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)?
A.	1/2[W(ω-ω0)- W(ω+ω0)]
B.	1/2[W(ω-ω0)+ W(ω+ω0)]
C.	[W(ω-ω0)+ W(ω+ω0)]
D.	[W(ω-ω0)- W(ω+ω0)]
Answer» C. [W(ω-ω0)+ W(ω+ω0)]

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