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Let z=costheta+isintheta. Then the value...

Let `z=costheta+isintheta`. Then the value of `sum_(m->1-15)Img(z^(2m-1))` at `theta=2^@` is: 1. `1/sin2^@` 2. `1/(3sin2^@)` 3. `1/sin2^@` 4. `1/(4sin2^@)`

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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