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(1+costheta-isintheta)^4=...

`(1+costheta-isintheta)^4`=

A

`2^4cos^4(theta/2)cis2theta`

B

`2^4cos^4(theta/2)cis(-2theta)`

C

`2^4sin^4(theta/2)cis2theta`

D

`2^4sin^4(theta/2)cis(-2theta)`

Text Solution

Verified by Experts

The correct Answer is:
B
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