Kalkulator Integral Tentu dan Tak Wajar
Hitung integral tentu dan tak wajar langkah demi langkah
Kalkulator akan mencoba mengevaluasi integral tentu (yaitu dengan batas-batas), termasuk integral tak wajar, dengan menampilkan langkah-langkahnya.
Solution
Your input: calculate $$$\int_{\pi}^{\frac{\pi}{2}}\left( \sin{\left(x \right)} \right)dx$$$
First, calculate the corresponding indefinite integral: $$$\int{\sin{\left(x \right)} d x}=- \cos{\left(x \right)}$$$ (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.
$$$\left(- \cos{\left(x \right)}\right)|_{\left(x=\frac{\pi}{2}\right)}=0$$$
$$$\left(- \cos{\left(x \right)}\right)|_{\left(x=\pi\right)}=1$$$
$$$\int_{\pi}^{\frac{\pi}{2}}\left( \sin{\left(x \right)} \right)dx=\left(- \cos{\left(x \right)}\right)|_{\left(x=\frac{\pi}{2}\right)}-\left(- \cos{\left(x \right)}\right)|_{\left(x=\pi\right)}=-1$$$
Answer: $$$\int_{\pi}^{\frac{\pi}{2}}\left( \sin{\left(x \right)} \right)dx=-1$$$