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

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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 u2061 frac{2 kn}{N} )
B.	( sum_{n=0}^{N-1} x(n) cos u2061 frac{2 kn}{N} )
C.	-j ( sum_{n=0}^{N-1} x(n) sin u2061 frac{2 kn}{N} )
D.	None of the mentioned
Answer» C. -j ( sum_{n=0}^{N-1} x(n) sin u2061 frac{2 kn}{N} )

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