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

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

A

`npi+(pi)/(4), n inZ`

B

`npi+(-1)(pi)/(4), n inZ`

C

`2npi +-(pi)/(4), n inZ`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
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