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cos 2theta cos 2phi + sin^2(theta-phi)-s...

`cos 2theta cos 2phi + sin^2(theta-phi)-sin^2(theta+phi)=cos(2theta + 2phi)`

A

`sin 2(theta + phi)`

B

`cos 2(theta + phi)`

C

`sin 2(theta - phi)`

D

`cos 2(theta - phi).`

Text Solution

Verified by Experts

The correct Answer is:
B
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