Evaluate: int(cos2x-cos2theta)/(cosx-cos...

Evaluate: `int(cos2x-cos2theta)/(cosx-costheta)dx`

A

`2(sinx +x cos theta)+C`

B

`2(sin x-x cos theta)+C`

C

`2(sin x + 2x cos theta)+C`

D

`2(sin x -2x cos theta)+C`

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The correct Answer is:

A

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