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Integral of 4*cos^2(x) dx

Limits of integration:

from to
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The graph:

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Piecewise:

The solution

You have entered [src]
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$$\int\limits_{\frac{\pi}{6}}^{\frac{\pi}{3}} 4 \cos^{2}{\left(x \right)}\, dx$$
Integral(4*cos(x)^2, (x, pi/6, pi/3))
Detail solution
  1. The integral of a constant times a function is the constant times the integral of the function:

    1. Rewrite the integrand:

    2. Integrate term-by-term:

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

        1. Let .

          Then let and substitute :

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

            1. The integral of cosine is sine:

            So, the result is:

          Now substitute back in:

        So, the result is:

      1. The integral of a constant is the constant times the variable of integration:

      The result is:

    So, the result is:

  2. Add the constant of integration:


The answer is:

The graph
The answer [src]
pi
--
3 
$$\frac{\pi}{3}$$
=
=
pi
--
3 
$$\frac{\pi}{3}$$
pi/3
Numerical answer [src]
1.0471975511966
1.0471975511966

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