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If int (sin 2x)/((a+b cosx)^(2))dx=alpha...

If `int (sin 2x)/((a+b cosx)^(2))dx=alpha[log_(e )|a+b cos x|+(a)/(a+b cosx)]+c`, then `alpha=`

A

`(2)/(b^(2))`

B

`(2)/(a^(2))`

C

`-(2)/(b^(2))`

D

`-(2)/(a^(2))`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2021-MULTIPLE CHOICE QUESTION
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