Question

Find derivative of √cosec x

Answer 1

ANSWER:-

y = cosecx

we know ,

Lim(∆x→0)∆y/∆x =Lim(∆x→0){f(x+∆x)-f(x)}/∆x

Lim(∆x→0){cosec(x+∆x)-cosecx}/∆x

use L—hospital rule ,

dy/dx =-cosecx.cotx

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