Question

tan^4x-sec^4x=1- 2 sec ^2x
Por faaaaa

Answer 1

Respuesta:

Explicación paso a paso:

$tan^{4} x-sec^{4} x=1-2sec^{2} x\\\\tan^{2} x*tan^{2} x-sec^{4}x=1-2sec^{2} x\\\\(2sec^{2}-1)*(2sec^{2}x-1)-sec^{4}x=1-2sec^{2} x\\\\sec^{4}x-sec^{2}x-sec^{2}x+1-sec^{4}x=1-2sec^{2} x\\\\-sec^{2}x-sec^{2}x+1-=1-2sec^{2} x\\\\1-2sec^{2} x=1-2sec^{2} x$