Mister Exam

Integral of x^3cosx dx

Limits of integration:

from to
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
  1             
  /             
 |              
 |   3          
 |  x *cos(x) dx
 |              
/               
0               
$$\int\limits_{0}^{1} x^{3} \cos{\left(x \right)}\, dx$$
Detail solution
  1. Use integration by parts:

    Let and let .

    Then .

    To find :

    1. The integral of cosine is sine:

    Now evaluate the sub-integral.

  2. Use integration by parts:

    Let and let .

    Then .

    To find :

    1. The integral of sine is negative cosine:

    Now evaluate the sub-integral.

  3. Use integration by parts:

    Let and let .

    Then .

    To find :

    1. The integral of cosine is sine:

    Now evaluate the sub-integral.

  4. The integral of a constant times a function is the constant times the integral of the function:

    1. The integral of sine is negative cosine:

    So, the result is:

  5. Add the constant of integration:


The answer is:

The answer (Indefinite) [src]
  /                                                                  
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 |  3                             3                          2       
 | x *cos(x) dx = C - 6*cos(x) + x *sin(x) - 6*x*sin(x) + 3*x *cos(x)
 |                                                                   
/                                                                    
$$\left(x^3-6\,x\right)\,\sin x+\left(3\,x^2-6\right)\,\cos x$$
The graph
The answer [src]
6 - 5*sin(1) - 3*cos(1)
$$-5\,\sin 1-3\,\cos 1+6$$
=
=
6 - 5*sin(1) - 3*cos(1)
$$- 5 \sin{\left(1 \right)} - 3 \cos{\left(1 \right)} + 6$$
Numerical answer [src]
0.171738158356098
0.171738158356098
The graph
Integral of x^3cosx dx

    Use the examples entering the upper and lower limits of integration.