Applicare la formula: $a=b$$\to inverse\left(a,a\right)=inverse\left(a,b\right)$, dove $a=\sin\left(2v\right)$ e $b=-\sin\left(135-x\right)$

Applicare la formula: $\arcsin\left(\sin\left(\theta \right)\right)$$=\theta $, dove $x=2v$

Applicare la formula: $ax=b$$\to x=\frac{b}{a}$, dove $a=2$, $b=\arcsin\left(-\sin\left(135-x\right)\right)$ e $x=v$