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The real value of theta for which the ex...

The real value of `theta` for which the expression `(1 + icos theta)/(1 - 2i cos theta)` is real number is

A

`npi+pi/4`

B

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

C

`2npipmpi/2`

D

None of these

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The correct Answer is:
C
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