Applicare la formula: $\int_{a}^{b} cxdx$$=c\int_{a}^{b} xdx$, dove $a=0$, $b=\frac{1}{2}$, $c=5$ e $x=\arccos\left(x\right)$

Applicare la formula: $\int\arccos\left(\theta \right)dx$$=\theta \arccos\left(\theta \right)-\sqrt{1-\theta ^2}+C$

Applicare la formula: $\left[x\right]_{a}^{b}$$=eval\left(x,b\right)-eval\left(x,a\right)+C$, dove $a=0$, $b=\frac{1}{2}$ e $x=x\arccos\left(x\right)-\sqrt{1-x^2}$