$$$\cos{\left(\theta \right)}$$$の積分

この計算機は、手順を示しながら$$$\cos{\left(\theta \right)}$$$の不定積分（原始関数）を求めます。

$$$\int \cos{\left(\theta \right)}\, d\theta$$$ を求めよ。

余弦の積分は$$$\int{\cos{\left(\theta \right)} d \theta} = \sin{\left(\theta \right)}$$$:

$${\color{red}{\int{\cos{\left(\theta \right)} d \theta}}} = {\color{red}{\sin{\left(\theta \right)}}}$$

したがって、

$$\int{\cos{\left(\theta \right)} d \theta} = \sin{\left(\theta \right)}$$

積分定数を加える:

$$\int{\cos{\left(\theta \right)} d \theta} = \sin{\left(\theta \right)}+C$$

$$$\int \cos{\left(\theta \right)}\, d\theta = \sin{\left(\theta \right)} + C$$$A

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