Mister Exam

Derivative of e^xcosx

Function f() - derivative -N order at the point
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
 x       
E *cos(x)
$$e^{x} \cos{\left(x \right)}$$
E^x*cos(x)
Detail solution
  1. Apply the product rule:

    ; to find :

    1. The derivative of is itself.

    ; to find :

    1. The derivative of cosine is negative sine:

    The result is:

  2. Now simplify:


The answer is:

The graph
The first derivative [src]
        x    x       
cos(x)*e  - e *sin(x)
$$- e^{x} \sin{\left(x \right)} + e^{x} \cos{\left(x \right)}$$
The second derivative [src]
    x       
-2*e *sin(x)
$$- 2 e^{x} \sin{\left(x \right)}$$
The third derivative [src]
                      x
-2*(cos(x) + sin(x))*e 
$$- 2 \left(\sin{\left(x \right)} + \cos{\left(x \right)}\right) e^{x}$$
The graph
Derivative of e^xcosx