If y=(secx-tanx)/(secx+tanx), then (dy)/...

If `y=(secx-tanx)/(secx+tanx),` then `(dy)/(dx)` equals.

A

`2secx(secx-tanx)`

B

`-2secx(secx-tanx)^(2)`

C

`2secx(secx-tanx)^(2)`

D

`-2secx(secx+tanx)^(2)`

Verified by Experts

The correct Answer is:

B

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