If x(n) is real and even, then what is the DFT of x(n)? – McqOptions

MCQOPTIONS

1.	If x(n) is real and even, then what is the DFT of x(n)?
A.	\(\sum_{n=0}^{N-1} x(n) sin⁡\frac{2πkn}{N}\)
B.	\(\sum_{n=0}^{N-1} x(n) cos⁡\frac{2πkn}{N}\)
C.	-j\(\sum_{n=0}^{N-1} x(n) sin⁡\frac{2πkn}{N}\)
D.	None of the mentioned
Answer» C. -j\(\sum_{n=0}^{N-1} x(n) sin⁡\frac{2πkn}{N}\)

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