Calculadora de Integrais Definidas e Impróprias

A calculadora tentará calcular a integral definida (isto é, com limites), inclusive no caso impróprio, com os passos mostrados.

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Integrate with respect to:

Enter a lower limit:

If you need `-oo`, type -inf.

Enter an upper limit:

If you need `oo`, type inf.

Please write without any differentials such as `dx`, `dy` etc.

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Solution

Your input: calculate $$$\int_{0}^{2 \pi}\left( \sin^{2}{\left(x \right)} \right)dx$$$

First, calculate the corresponding indefinite integral: $$$\int{\sin^{2}{\left(x \right)} d x}=\frac{x}{2} - \frac{\sin{\left(2 x \right)}}{4}$$$ (for steps, see indefinite integral calculator)

According to the Fundamental Theorem of Calculus, $$$\int_a^b F(x) dx=f(b)-f(a)$$$, so just evaluate the integral at the endpoints, and that's the answer.

$$$\left(\frac{x}{2} - \frac{\sin{\left(2 x \right)}}{4}\right)|_{\left(x=2 \pi\right)}=\pi$$$

$$$\left(\frac{x}{2} - \frac{\sin{\left(2 x \right)}}{4}\right)|_{\left(x=0\right)}=0$$$

$$$\int_{0}^{2 \pi}\left( \sin^{2}{\left(x \right)} \right)dx=\left(\frac{x}{2} - \frac{\sin{\left(2 x \right)}}{4}\right)|_{\left(x=2 \pi\right)}-\left(\frac{x}{2} - \frac{\sin{\left(2 x \right)}}{4}\right)|_{\left(x=0\right)}=\pi$$$

Answer: $$$\int_{0}^{2 \pi}\left( \sin^{2}{\left(x \right)} \right)dx=\pi\approx 3.14159265358979$$$

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Calculadora de Integrais Definidas e Impróprias

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Solution