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

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

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