Question

$verificar\:\tan ^2\left(x\right)-\sin ^2\left(x\right)=\tan ^2\left(x\right)\sin ^2\left(x\right)$

Answer 1

Respuesta:

$=\tan ^2\left(x\right)-\sin ^2\left(x\right)$

Answer 2

Respuesta:

$=\left(1-\cos ^2\left(x\right)\right)\tan ^2\left(x\right)\\\\=\tan ^2\left(x\right)-\cos ^2\left(x\right)\tan ^2\left(x\right)\\\\=\tan ^2\left(x\right)-\sin ^2\left(x\right)\\\\\Rightarrow \mathrm{Verdadero}$