2cosx - secx = cosx - tanx/cscx

2cosx - secx = cosx - tanx/cscx

options a. cot u =sin (u)/cos(u) b. sec(-u)=sec(u) c. 1+tan^2(u)=sec^2(u) d.cos (u)=1/sec(u)

Verify the identity

what are the steps to verify this trig identity

This is for my trig class, thanks for the help!

This is for my trig class, thanks for the help!

This is for my trig class, thanks for the help!

This is for my trig class, thanks for the help!

This is for my trig class, thanks for the help!

This is for my trig class, thanks for the help!

I need to verify this question to make the identities match