Question

differentiate it with respect to x.​

Answer 1

$x x + 1$

x and x+1 are significant

Answer 2

by using the rule of derivatives

we have

-cosx(1-cosx) - ( - sinx)(1-sinx)

-cosx + cos²x - sin²x + sinx

now putting X as π/2

we have

0 + 0 - 1 + 1

thus zero is the answer