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If w=cos""(pi)/(n)+isin""(pi)/(n) then v...

If `w=cos""(pi)/(n)+isin""(pi)/(n)` then value of `1+w+w^(2)+.......+w^(n-1)` is :

A

`1+i`

B

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

C

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

D

None of these

Text Solution

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The correct Answer is:
C
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