Applicare la formula: $x+a=b$$\to x=b-a$, dove $a=1$, $b=3\sin\left(s\right)$, $x+a=b=1+\sin\left(a\right)=3\sin\left(s\right)$, $x=\sin\left(a\right)$ e $x+a=1+\sin\left(a\right)$

Applicare la formula: $a=b$$\to inverse\left(a,a\right)=inverse\left(a,b\right)$, dove $a=\sin\left(a\right)$ e $b=3\sin\left(s\right)-1$

Applicare la formula: $\arcsin\left(\sin\left(\theta \right)\right)$$=\theta $, dove $x=a$