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$$$\cos{\left(\theta \right)}$$$ 的积分
您的输入
求$$$\int \cos{\left(\theta \right)}\, d\theta$$$。
解答
余弦函数的积分为 $$$\int{\cos{\left(\theta \right)} d \theta} = \sin{\left(\theta \right)}$$$：
$${\color{red}{\int{\cos{\left(\theta \right)} d \theta}}} = {\color{red}{\sin{\left(\theta \right)}}}$$
因此，
$$\int{\cos{\left(\theta \right)} d \theta} = \sin{\left(\theta \right)}$$
加上积分常数：
$$\int{\cos{\left(\theta \right)} d \theta} = \sin{\left(\theta \right)}+C$$
答案
$$$\int \cos{\left(\theta \right)}\, d\theta = \sin{\left(\theta \right)} + C$$$A
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