1.

If (a= frac{1}{ sqrt 2}+ frac{i}{ sqrt 2} ), find the value of a5 + conjugate of a5=?

A. (cos u2061 frac{3 pi}{4} )
B. (2 sin u2061 frac{5 pi}{4} )
C. (2 cos frac{5 pi}{4} )
D. (cos frac{5 pi}{4} )
Answer» D. (cos frac{5 pi}{4} )


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