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The value of underset(i=1)overset(6)Sigm...

The value of `underset(i=1)overset(6)Sigma(sin .(2pik)/(7)-i cos .(2pik)/(7))`

A

`-1`

B

`0`

C

`-i`

D

`i`

Text Solution

Verified by Experts

The correct Answer is:
D
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