Question

Proof: Secx-sinxtanx

Answer 1

rewrite in terms of sin and cos, factor out cos, use sin^2+cos^2=1 to replace 1-sin^2 with cos^2, reduce, and you have cosx

Answer 2

My bad it should say Secx-sinxtanx=cosx

Answer 3

I have to prove it using the identities

Answer 4

(1/cos)-(sin^2/cos) = 1/cos(1-sin^2) = 1/cos(cos^2) = cos