Applicare l'identità trigonometrica: $\tan\left(\theta \right)^n$$=\frac{\sin\left(\theta \right)^n}{\cos\left(\theta \right)^n}$, dove $x=y$ e $n=2$

Applicare la formula: $\frac{a}{\frac{b}{c}}$$=\frac{ac}{b}$, dove $a=\sin\left(y\right)$, $b=\sin\left(y\right)^2$, $c=\cos\left(y\right)^2$, $a/b/c=\frac{\sin\left(y\right)}{\frac{\sin\left(y\right)^2}{\cos\left(y\right)^2}}$ e $b/c=\frac{\sin\left(y\right)^2}{\cos\left(y\right)^2}$

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