Applicare l'identità trigonometrica: $\sec\left(\theta \right)^2-1$$=\tan\left(\theta \right)^2$

Simplify $\left(\tan\left(x\right)^2\right)^{\cos\left(x\right)}$ using the power of a power property: $\left(a^m\right)^n=a^{m\cdot n}$. In the expression, $m$ equals $2$ and $n$ equals $\cos\left(x\right)$