Applicare la formula: $\int\sin\left(\theta \right)^ndx$$=\frac{-\sin\left(\theta \right)^{\left(n-1\right)}\cos\left(\theta \right)}{n}+\frac{n-1}{n}\int\sin\left(\theta \right)^{\left(n-2\right)}dx$, dove $n=3$

Applicare la formula: $\int\sin\left(\theta \right)dx$$=-\cos\left(\theta \right)+C$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=2$, $b=3$, $c=-1$, $a/b=\frac{2}{3}$ e $ca/b=-\left(\frac{2}{3}\right)\cos\left(x\right)$

Applicare la formula: $\left[x\right]_{a}^{b}$$=eval\left(x,b\right)-eval\left(x,a\right)+C$, dove $a=0$, $b=\frac{\pi }{2}$ e $x=\frac{-\sin\left(x\right)^{2}\cos\left(x\right)}{3}-\frac{2}{3}\cos\left(x\right)$