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If sin^2theta=sinphi cosphi then the val...

If `sin^2theta=sinphi cosphi` then the value of `cos2theta` is

A

`cos^2(pi/4+phi)`

B

`2cos^2(pi/4+phi)`

C

`3cos^2(pi/4+phi)`

D

`4cos^2(pi/4+phi)`

Text Solution

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The correct Answer is:
B
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