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If y=(log)(sinx)(tanx) , then (((dy)/(dx...

If `y=(log)_(sinx)(tanx)` , then `(((dy)/(dx)))_(pi//4)` is equal to.......

A

`(4)/(log2)`

B

`-(4)/(log2)`

C

`(1)/(log2)`

D

`1`

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The correct Answer is:
B
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