Applicare la formula: $\sin\left(\arctan\left(\theta \right)\right)$$=\frac{\theta }{\sqrt{\theta ^2+1}}$, dove $x=\frac{1}{x}$

Applicare la formula: $\frac{\frac{a}{b}}{c}$$=\frac{a}{bc}$, dove $a=1$, $b=x$, $c=\sqrt{\left(\frac{1}{x}\right)^2+1}$, $a/b/c=\frac{\frac{1}{x}}{\sqrt{\left(\frac{1}{x}\right)^2+1}}$ e $a/b=\frac{1}{x}$

Applicare la formula: $\left(\frac{a}{b}\right)^n$$=\frac{a^n}{b^n}$, dove $a=1$, $b=x$ e $n=2$

Applicare la formula: $a^b$$=a^b$, dove $a=1$, $b=2$ e $a^b=1^2$