Prove that the following trigonometric equations are true. Homework Help ✎
(sec x − cos x) = 1
(cos x + 1)(cos x − 1) + sin2 x = 0
1. Change all terms to sine and cosine.
2. Get a common denominator for the terms in the parentheses.
3. Use the Fundamental Pythagorean Identity.
1. Multiply out on the left side.
2. Use the Fundamental Pythagorean Identity.