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The value of sum(k=1)^(6)[" sin"(2Kpi)/(...

The value of `sum_(k=1)^(6)[" sin"(2Kpi)/(7)- i " cos"(2Kpi)/(7)]` is

A

`-i`

B

i

C

1

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
D
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