Integral of $$$\sin{\left(a \right)}$$$ with respect to $$$x$$$
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Your Input
Find $$$\int \sin{\left(a \right)}\, dx$$$.
Solution
Apply the constant rule $$$\int c\, dx = c x$$$ with $$$c=\sin{\left(a \right)}$$$:
$${\color{red}{\int{\sin{\left(a \right)} d x}}} = {\color{red}{x \sin{\left(a \right)}}}$$
Therefore,
$$\int{\sin{\left(a \right)} d x} = x \sin{\left(a \right)}$$
Add the constant of integration:
$$\int{\sin{\left(a \right)} d x} = x \sin{\left(a \right)}+C$$
Answer
$$$\int \sin{\left(a \right)}\, dx = x \sin{\left(a \right)} + C$$$A