If y = sec ( tan^(-1) x) , then ( dy)...

If ` y = sec ( tan^(-1) x) ` , then `( dy)/( dx)` at x = 1 is equal to a)`1//2` b)1 c)`sqrt(2)` d)`1//sqrt(2)`

A

`1//2`

B

1

C

`sqrt(2)`

D

`1//sqrt(2)`

Verified by Experts

The correct Answer is:

D

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