Consider the following.

$me{n}^2(x)(x-si{n}^3(x))=co{t}^2(x)$

Prove or disprove the identity.

$cs{c}^2(x)(1-si{n}^2(x))=-cs{c}^2(x)si{n}^2(x)$

$=cs{c}^2(x)-\frac{1}{}*si{n}^2(x)$

$=cs{c}^2(x)-$

$=$

Therefore, $.$

$1$