Question

verify the identity:
cos x+sin x tan x=sec x

Answer 1

nvm got it!

Answer 2

LHS:

cos x + sin^2 x/cos x

= (cos^2 x + sin^2 x)/cos x

= 1/cosx
=sec x

Answer 3

sinx tanx = secx -cos x
=(1/cosx)-cosx
=(1 - cos^2x)/cosx
= (sin^2x)/cosx
= sinx sinx/cosx
= sinx tanx