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Identical expressions
((x^ two)- four)*sin(5x)
((x squared ) minus 4) multiply by sinus of (5x)
((x to the power of two) minus four) multiply by sinus of (5x)
((x2)-4)*sin(5x)
x2-4*sin5x
((x²)-4)*sin(5x)
((x to the power of 2)-4)*sin(5x)
((x^2)-4)sin(5x)
((x2)-4)sin(5x)
x2-4sin5x
x^2-4sin5x
((x^2)-4)*sin(5x)dx
Similar expressions
((x^2)+4)*sin(5x)

Integral of ((x^2)-4)*sin(5x) dx

The solution

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  1                     
  /                     
 |                      
 |  / 2    \            
 |  \x  - 4/*sin(5*x) dx
 |                      
/                       
0

$$\int\limits_{0}^{1} \left(x^{2} - 4\right) \sin{\left(5 x \right)}\, dx$$

Integral((x^2 - 4)*sin(5*x), (x, 0, 1))

Detail solution

There are multiple ways to do this integral.
Method #1
1. Rewrite the integrand:
  
  $\left(x^{2} - 4\right) \sin{\left(5 x \right)} = x^{2} \sin{\left(5 x \right)} - 4 \sin{\left(5 x \right)}$
2. Integrate term-by-term:
  1. Use integration by parts:
    
    $\int \operatorname{u} \operatorname{dv} = \operatorname{u}\operatorname{v} - \int \operatorname{v} \operatorname{du}$
    
    Let $u{\left(x \right)} = x^{2}$ and let $\operatorname{dv}{\left(x \right)} = \sin{\left(5 x \right)}$ .
    
    Then $\operatorname{du}{\left(x \right)} = 2 x$ .
    
    To find $v{\left(x \right)}$ :
    1. Let $u = 5 x$ .
      
      Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
      
      $\int \frac{\sin{\left(u \right)}}{5}\, du$
      
      The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \sin{\left(u \right)}\, du = \frac{\int \sin{\left(u \right)}\, du}{5}$
      
      The integral of sine is negative cosine:
      
      $\int \sin{\left(u \right)}\, du = - \cos{\left(u \right)}$
      
      So, the result is: $- \frac{\cos{\left(u \right)}}{5}$
      
      Now substitute $u$ back in:
      
      $- \frac{\cos{\left(5 x \right)}}{5}$
    Now evaluate the sub-integral.
  2. Use integration by parts:
    
    $\int \operatorname{u} \operatorname{dv} = \operatorname{u}\operatorname{v} - \int \operatorname{v} \operatorname{du}$
    
    Let $u{\left(x \right)} = - \frac{2 x}{5}$ and let $\operatorname{dv}{\left(x \right)} = \cos{\left(5 x \right)}$ .
    
    Then $\operatorname{du}{\left(x \right)} = - \frac{2}{5}$ .
    
    To find $v{\left(x \right)}$ :
    1. Let $u = 5 x$ .
      
      Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
      
      $\int \frac{\cos{\left(u \right)}}{5}\, du$
      
      The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \cos{\left(u \right)}\, du = \frac{\int \cos{\left(u \right)}\, du}{5}$
      
      The integral of cosine is sine:
      
      $\int \cos{\left(u \right)}\, du = \sin{\left(u \right)}$
      
      So, the result is: $\frac{\sin{\left(u \right)}}{5}$
      
      Now substitute $u$ back in:
      
      $\frac{\sin{\left(5 x \right)}}{5}$
    Now evaluate the sub-integral.
  3. The integral of a constant times a function is the constant times the integral of the function:
    
    $\int \left(- \frac{2 \sin{\left(5 x \right)}}{25}\right)\, dx = - \frac{2 \int \sin{\left(5 x \right)}\, dx}{25}$
    1. Let $u = 5 x$ .
      
      Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
      
      $\int \frac{\sin{\left(u \right)}}{5}\, du$
      
      The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \sin{\left(u \right)}\, du = \frac{\int \sin{\left(u \right)}\, du}{5}$
      
      The integral of sine is negative cosine:
      
      $\int \sin{\left(u \right)}\, du = - \cos{\left(u \right)}$
      
      So, the result is: $- \frac{\cos{\left(u \right)}}{5}$
      
      Now substitute $u$ back in:
      
      $- \frac{\cos{\left(5 x \right)}}{5}$
    So, the result is: $\frac{2 \cos{\left(5 x \right)}}{125}$
  1. The integral of a constant times a function is the constant times the integral of the function:
    
    $\int \left(- 4 \sin{\left(5 x \right)}\right)\, dx = - 4 \int \sin{\left(5 x \right)}\, dx$
    1. Let $u = 5 x$ .
      
      Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
      
      $\int \frac{\sin{\left(u \right)}}{5}\, du$
      
      The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \sin{\left(u \right)}\, du = \frac{\int \sin{\left(u \right)}\, du}{5}$
      
      The integral of sine is negative cosine:
      
      $\int \sin{\left(u \right)}\, du = - \cos{\left(u \right)}$
      
      So, the result is: $- \frac{\cos{\left(u \right)}}{5}$
      
      Now substitute $u$ back in:
      
      $- \frac{\cos{\left(5 x \right)}}{5}$
    So, the result is: $\frac{4 \cos{\left(5 x \right)}}{5}$
  The result is: $- \frac{x^{2} \cos{\left(5 x \right)}}{5} + \frac{2 x \sin{\left(5 x \right)}}{25} + \frac{102 \cos{\left(5 x \right)}}{125}$
Method #2
1. Use integration by parts:
  
  $\int \operatorname{u} \operatorname{dv} = \operatorname{u}\operatorname{v} - \int \operatorname{v} \operatorname{du}$
  
  Let $u{\left(x \right)} = x^{2} - 4$ and let $\operatorname{dv}{\left(x \right)} = \sin{\left(5 x \right)}$ .
  
  Then $\operatorname{du}{\left(x \right)} = 2 x$ .
  
  To find $v{\left(x \right)}$ :
  1. Let $u = 5 x$ .
    
    Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
    
    $\int \frac{\sin{\left(u \right)}}{5}\, du$
    1. The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \sin{\left(u \right)}\, du = \frac{\int \sin{\left(u \right)}\, du}{5}$
      
      The integral of sine is negative cosine:
      
      $\int \sin{\left(u \right)}\, du = - \cos{\left(u \right)}$
      
      So, the result is: $- \frac{\cos{\left(u \right)}}{5}$
    Now substitute $u$ back in:
    
    $- \frac{\cos{\left(5 x \right)}}{5}$
  Now evaluate the sub-integral.
2. Use integration by parts:
  
  $\int \operatorname{u} \operatorname{dv} = \operatorname{u}\operatorname{v} - \int \operatorname{v} \operatorname{du}$
  
  Let $u{\left(x \right)} = - \frac{2 x}{5}$ and let $\operatorname{dv}{\left(x \right)} = \cos{\left(5 x \right)}$ .
  
  Then $\operatorname{du}{\left(x \right)} = - \frac{2}{5}$ .
  
  To find $v{\left(x \right)}$ :
  1. Let $u = 5 x$ .
    
    Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
    
    $\int \frac{\cos{\left(u \right)}}{5}\, du$
    1. The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \cos{\left(u \right)}\, du = \frac{\int \cos{\left(u \right)}\, du}{5}$
      
      The integral of cosine is sine:
      
      $\int \cos{\left(u \right)}\, du = \sin{\left(u \right)}$
      
      So, the result is: $\frac{\sin{\left(u \right)}}{5}$
    Now substitute $u$ back in:
    
    $\frac{\sin{\left(5 x \right)}}{5}$
  Now evaluate the sub-integral.
3. The integral of a constant times a function is the constant times the integral of the function:
  
  $\int \left(- \frac{2 \sin{\left(5 x \right)}}{25}\right)\, dx = - \frac{2 \int \sin{\left(5 x \right)}\, dx}{25}$
  1. Let $u = 5 x$ .
    
    Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
    
    $\int \frac{\sin{\left(u \right)}}{5}\, du$
    1. The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \sin{\left(u \right)}\, du = \frac{\int \sin{\left(u \right)}\, du}{5}$
      
      The integral of sine is negative cosine:
      
      $\int \sin{\left(u \right)}\, du = - \cos{\left(u \right)}$
      
      So, the result is: $- \frac{\cos{\left(u \right)}}{5}$
    Now substitute $u$ back in:
    
    $- \frac{\cos{\left(5 x \right)}}{5}$
  So, the result is: $\frac{2 \cos{\left(5 x \right)}}{125}$
Method #3
1. Rewrite the integrand:
  
  $\left(x^{2} - 4\right) \sin{\left(5 x \right)} = x^{2} \sin{\left(5 x \right)} - 4 \sin{\left(5 x \right)}$
2. Integrate term-by-term:
  1. Use integration by parts:
    
    $\int \operatorname{u} \operatorname{dv} = \operatorname{u}\operatorname{v} - \int \operatorname{v} \operatorname{du}$
    
    Let $u{\left(x \right)} = x^{2}$ and let $\operatorname{dv}{\left(x \right)} = \sin{\left(5 x \right)}$ .
    
    Then $\operatorname{du}{\left(x \right)} = 2 x$ .
    
    To find $v{\left(x \right)}$ :
    1. Let $u = 5 x$ .
      
      Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
      
      $\int \frac{\sin{\left(u \right)}}{5}\, du$
      
      The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \sin{\left(u \right)}\, du = \frac{\int \sin{\left(u \right)}\, du}{5}$
      
      The integral of sine is negative cosine:
      
      $\int \sin{\left(u \right)}\, du = - \cos{\left(u \right)}$
      
      So, the result is: $- \frac{\cos{\left(u \right)}}{5}$
      
      Now substitute $u$ back in:
      
      $- \frac{\cos{\left(5 x \right)}}{5}$
    Now evaluate the sub-integral.
  2. Use integration by parts:
    
    $\int \operatorname{u} \operatorname{dv} = \operatorname{u}\operatorname{v} - \int \operatorname{v} \operatorname{du}$
    
    Let $u{\left(x \right)} = - \frac{2 x}{5}$ and let $\operatorname{dv}{\left(x \right)} = \cos{\left(5 x \right)}$ .
    
    Then $\operatorname{du}{\left(x \right)} = - \frac{2}{5}$ .
    
    To find $v{\left(x \right)}$ :
    1. Let $u = 5 x$ .
      
      Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
      
      $\int \frac{\cos{\left(u \right)}}{5}\, du$
      
      The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \cos{\left(u \right)}\, du = \frac{\int \cos{\left(u \right)}\, du}{5}$
      
      The integral of cosine is sine:
      
      $\int \cos{\left(u \right)}\, du = \sin{\left(u \right)}$
      
      So, the result is: $\frac{\sin{\left(u \right)}}{5}$
      
      Now substitute $u$ back in:
      
      $\frac{\sin{\left(5 x \right)}}{5}$
    Now evaluate the sub-integral.
  3. The integral of a constant times a function is the constant times the integral of the function:
    
    $\int \left(- \frac{2 \sin{\left(5 x \right)}}{25}\right)\, dx = - \frac{2 \int \sin{\left(5 x \right)}\, dx}{25}$
    1. Let $u = 5 x$ .
      
      Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
      
      $\int \frac{\sin{\left(u \right)}}{5}\, du$
      
      The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \sin{\left(u \right)}\, du = \frac{\int \sin{\left(u \right)}\, du}{5}$
      
      The integral of sine is negative cosine:
      
      $\int \sin{\left(u \right)}\, du = - \cos{\left(u \right)}$
      
      So, the result is: $- \frac{\cos{\left(u \right)}}{5}$
      
      Now substitute $u$ back in:
      
      $- \frac{\cos{\left(5 x \right)}}{5}$
    So, the result is: $\frac{2 \cos{\left(5 x \right)}}{125}$
  1. The integral of a constant times a function is the constant times the integral of the function:
    
    $\int \left(- 4 \sin{\left(5 x \right)}\right)\, dx = - 4 \int \sin{\left(5 x \right)}\, dx$
    1. Let $u = 5 x$ .
      
      Then let $du = 5 dx$ and substitute $\frac{du}{5}$ :
      
      $\int \frac{\sin{\left(u \right)}}{5}\, du$
      
      The integral of a constant times a function is the constant times the integral of the function:
      
      $\int \sin{\left(u \right)}\, du = \frac{\int \sin{\left(u \right)}\, du}{5}$
      
      The integral of sine is negative cosine:
      
      $\int \sin{\left(u \right)}\, du = - \cos{\left(u \right)}$
      
      So, the result is: $- \frac{\cos{\left(u \right)}}{5}$
      
      Now substitute $u$ back in:
      
      $- \frac{\cos{\left(5 x \right)}}{5}$
    So, the result is: $\frac{4 \cos{\left(5 x \right)}}{5}$
  The result is: $- \frac{x^{2} \cos{\left(5 x \right)}}{5} + \frac{2 x \sin{\left(5 x \right)}}{25} + \frac{102 \cos{\left(5 x \right)}}{125}$
Add the constant of integration:

$- \frac{x^{2} \cos{\left(5 x \right)}}{5} + \frac{2 x \sin{\left(5 x \right)}}{25} + \frac{102 \cos{\left(5 x \right)}}{125}+ \mathrm{constant}$

The answer is:

$- \frac{x^{2} \cos{\left(5 x \right)}}{5} + \frac{2 x \sin{\left(5 x \right)}}{25} + \frac{102 \cos{\left(5 x \right)}}{125}+ \mathrm{constant}$

The answer (Indefinite) [src]

  /                                                                    
 |                                            2                        
 | / 2    \                   102*cos(5*x)   x *cos(5*x)   2*x*sin(5*x)
 | \x  - 4/*sin(5*x) dx = C + ------------ - ----------- + ------------
 |                                125             5             25     
/

$$\int \left(x^{2} - 4\right) \sin{\left(5 x \right)}\, dx = C - \frac{x^{2} \cos{\left(5 x \right)}}{5} + \frac{2 x \sin{\left(5 x \right)}}{25} + \frac{102 \cos{\left(5 x \right)}}{125}$$

Simplify

The graph

Plot the graph f(x)

The answer [src]

  102   2*sin(5)   77*cos(5)
- --- + -------- + ---------
  125      25         125

$$- \frac{102}{125} + \frac{2 \sin{\left(5 \right)}}{25} + \frac{77 \cos{\left(5 \right)}}{125}$$

  102   2*sin(5)   77*cos(5)
- --- + -------- + ---------
  125      25         125

$$- \frac{102}{125} + \frac{2 \sin{\left(5 \right)}}{25} + \frac{77 \cos{\left(5 \right)}}{125}$$

-102/125 + 2*sin(5)/25 + 77*cos(5)/125

Numerical answer [src]

-0.717978035727704

-0.717978035727704

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

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How to use it?

Identical expressions

Similar expressions

Integral of ((x^2)-4)*sin(5x) dx

Limits of integration:

The graph:

Piecewise:

The solution

Method #1

Method #2

Method #3