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The real part of (1+ cos ""pi/5 + i sin ...

The real part of `(1+ cos ""pi/5 + i sin ""pi/5)^(-1)` is-

A

`1/2 cos "" pi/10`

B

`(1)/(2 cos ""(pi)/(10))`

C

`1/2`

D

1

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The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 9
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