Integral of sint*cost dx

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 2*pi                
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  |                  
  |  sin(t)*cos(t) dt
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 0

\int\limits_{0}^{2 \pi} \sin{\left(t \right)} \cos{\left(t \right)}\, dt

Integral(sin(t)*cos(t), (t, 0, 2*pi))

Detail solution

There are multiple ways to do this integral.
Method #1
1. Let $u = \sin{\left(t \right)}$ .
  
  Then let $du = \cos{\left(t \right)} dt$ and substitute $du$ :
  
  $\int u\, du$
  1. The integral of $u^{n}$ is $\frac{u^{n + 1}}{n + 1}$ when $n \neq -1$ :
    
    $\int u\, du = \frac{u^{2}}{2}$
  Now substitute $u$ back in:
  
  $\frac{\sin^{2}{\left(t \right)}}{2}$
Method #2
1. Let $u = \cos{\left(t \right)}$ .
  
  Then let $du = - \sin{\left(t \right)} dt$ and substitute $- du$ :
  
  $\int \left(- u\right)\, du$
  1. The integral of a constant times a function is the constant times the integral of the function:
    
    $\int u\, du = - \int u\, du$
    1. The integral of $u^{n}$ is $\frac{u^{n + 1}}{n + 1}$ when $n \neq -1$ :
      
      $\int u\, du = \frac{u^{2}}{2}$
    So, the result is: $- \frac{u^{2}}{2}$
  Now substitute $u$ back in:
  
  $- \frac{\cos^{2}{\left(t \right)}}{2}$
Add the constant of integration:

$\frac{\sin^{2}{\left(t \right)}}{2}+ \mathrm{constant}$

The answer is:

\frac{\sin^{2}{\left(t \right)}}{2}+ \mathrm{constant}

The answer (Indefinite) [src]

  /                          2   
 |                        sin (t)
 | sin(t)*cos(t) dt = C + -------
 |                           2   
/

\int \sin{\left(t \right)} \cos{\left(t \right)}\, dt = C + \frac{\sin^{2}{\left(t \right)}}{2}

Simplify

The graph

Plot the graph f(x)

The answer [src]

0

0

Numerical answer [src]

-3.51131525958827e-22

-3.51131525958827e-22

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

Method #1