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

The real value of `alpha` for which the expression `(1- isin alpha)/(1+2i sinalpha)` is purely real is

A

`(n+1) (pi)/(2)`

B

`(2n +1) (pi)/(2)`

C

` n pi`

D

None of these

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VMC MODULES ENGLISH-COMPLEX NUMBERS -JEE ARCHIVE
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