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Let z=cos theta+isintheta. Then the valu...

Let `z=cos theta+isintheta`. Then the value of `sum_(m-1)^(15)Im(z^(2m)-1)` at `theta=2^(@)` is

A

`(1)/(sin2^(@))`

B

`(1)/(3sin2^(@))`

C

`(1)/(2sin2^(@))`

D

`(1)/(4sin2^(@))`

Text Solution

Verified by Experts

The correct Answer is:
D
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