Question

Factor the expression below and use fundamental identities to simplify.

Answer 1

\[\cos ^{2}x \sec ^{2}x - \cos ^{2} x\]

Answer 2

cos^2x (sec^2x - 1)
= cos^2x* tan^2x
= cos^2x * sin^2x
------
cos^2x

= sin ^2x

Answer 3

Wha... wha? I'm not going to pretend to know how you got that but thanks.

Answer 4

i used 2 trig identities sec^2x = 1 + tan^2x and tanx = sinx / cosx