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If y=tan^(-1)sqrt(((1+sinx)/(1-sinx))),(...

If `y=tan^(-1)sqrt(((1+sinx)/(1-sinx))),(pi)/(2)ltxltpi,` then `(dy)/(dx)` equals to

A

`-1//2`

B

`-1`

C

`1//2`

D

`1`

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The correct Answer is:
A
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