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The set of positive values of n for whic...

The set of positive values of n for which `(sqrt((1+cos 30^(@))/(2))+ i sqrt((1-cos 30^(@))/(2)))^(n)` is real, is

A

A) 4,8,12,….

B

B) 6,12,18,….

C

C) 8,16,24,…

D

D) 12,24,36,…

Text Solution

Verified by Experts

The correct Answer is:
D
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