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

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

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