1.

(1+costheta-isintheta)^4=

Answer»

`2^4cos^4(theta/2)cis2theta`
`2^4cos^4(theta/2)CIS(-2THETA)`
`2^4sin^4(theta/2)cis2theta`
`2^4sin^4(theta/2)cis(-2theta)`

ANSWER :B


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