Derivative of 3cosx

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3*cos(x)

$$3 \cos{\left(x \right)}$$

3*cos(x)

Detail solution

The derivative of a constant times a function is the constant times the derivative of the function.
1. The derivative of cosine is negative sine:
  
  $\frac{d}{d x} \cos{\left(x \right)} = - \sin{\left(x \right)}$
So, the result is: $- 3 \sin{\left(x \right)}$

The answer is:

$- 3 \sin{\left(x \right)}$

The graph

Plot the graph f(x)

Plot the graph f'(x)

The first derivative [src]

-3*sin(x)

$$- 3 \sin{\left(x \right)}$$

Simplify

The second derivative [src]

-3*cos(x)

$$- 3 \cos{\left(x \right)}$$

Simplify

The third derivative [src]

3*sin(x)

$$3 \sin{\left(x \right)}$$

Simplify

The graph