5.4 Indefinite Integrals and the Net Change Theorem/15

${\begin{aligned}&\int \left(\theta -\csc {(\theta )}\cot {(\theta )}\right)d\theta \\&={\frac {\theta ^{2}}{2}}+\csc {(\theta )}+C\\&={\frac {1}{2}}\theta ^{2}+\csc {(\theta )}+C\end{aligned}}$