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The real value of thetafor which the exp...

The real value of `theta`for which the expression is
`(1+icos theta)/(1-i cos theta)` is a real number is

A

`n pi+(pi)/(4)`

B

`n pi+(-1)^(n) (pi)/(4)`

C

`2 n pi pm (pi)/(2)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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