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(d)/(dx)sqrt(sec^(2)x+cosec^(2)x)=...

`(d)/(dx)sqrt(sec^(2)x+cosec^(2)x)=`

A

`4*csc2x*cot2x`

B

`-4*csc2x*cot2x`

C

`-4*cscx*cot2x`

D

none of theses

Text Solution

Verified by Experts

The correct Answer is:
B
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