Question

Find the derivative of cos (5x +2) by first principle method

Answer 1

Answer:

Step-by-step explanation:

Now applying the chain rule of differential equations;

$\frac{df}{dx} = \frac{df}{du} \frac{du}{dx}$;

Now applying this on the questions:

$\frac{dcos(u)}{dx} ; u = 5x+2;$

$\frac{d cos(u)}{du} = -sin (u); and \frac{d(5x+2)}{du} = 5$;

We get the solution like:

$\frac{d cos (5x+2)}{dx} = -5sin(5x+2)$