tolong jawab iya kak , sekalian dikasih cara

[tex]1) {sec}^{2} x(1 - {cos}^{2} x) = {tan}^{2} x \\ \frac{1}{ {cos}^{2} x} ( {sin}^{2} x) = \frac{ {sin}^{2} x}{ {cos}^{2}x } = {tan}^{2} x[/tex]