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यदि y= sec tan ^(-1) x, तब (dy)/(dx) ...

यदि ` y= sec tan ^(-1) x,` तब ` (dy)/(dx) =`

A

`x/sqrt(1+x^2)`

B

`(-x)/sqrt(1+x^2)`

C

`(x)/sqrt(1-x^2)`

D

None of these

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The correct Answer is:
A
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