Calculus Examples

$9 \cos (x)$

Step 1

Since $9$ is constant with respect to $x$ , the derivative of $9 \cos (x)$ with respect to $x$ is $9 \frac{d}{d x} [\cos (x)]$ .

$9 \frac{d}{d x} [\cos (x)]$

Step 2

The derivative of $\cos (x)$ with respect to $x$ is $- \sin (x)$ .

$9 (- \sin (x))$

Step 3

Multiply $- 1$ by $9$ .

$- 9 \sin (x)$