Question

f(x) = Cos(2x+3) solve by using 1st principle of derivative​

Answer 1

Explanation:

$\frac{d}{dx} cos(2x + 3)$

let 2x+3= y

$\frac{d}{dx} cosy \: = - siny$

$\frac{d}{dx} 2x + 3 = 2$

then -2 .sin (2x+3)