Question

I need help with number 3 ASAP please! cos^2u- cos u sec u= cot^2 u
PLEASE I NEED HELP

Answer 1

cosx

Explanation:

using the identity

• sin² = 1 - cos²x

cos²x + cosx - 1 + sin²x

= cos²x + cosx - 1 + 1 - cos²x ← collect like terms

= cos x