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frac{(costheta+isintheta)^4}{(sintheta+i...

`frac{(costheta+isintheta)^4}{(sintheta+icostheta)^5}` is equal to

A

`costheta -isintheta`

B

`cos9theta-isin9theta`

C

`sintheta-icostheta`

D

`sin9theta-icos9theta`

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