int(cos7x-cos8x)/(cos2x-cos3x)dx...

`int(cos7x-cos8x)/(cos2x-cos3x)dx`

A

`(sin2x)/(2)-(sin3x)/(3)+c`

B

`(sin5x)/(5)-(cos5x)/(4)+c`

C

`(cosx)/(3)-(sin4x)/(2)+c`

D

none of these

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The correct Answer is:

A

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