1. 7.1-7.2 Basic Trigonometric Identities In this powerpoint, we will use trig identities to verify and prove equations

7. See what you get

13. Etc.

14. 5.4.8 Proving an Identity Prove the following: a) sec x(1 + cos x) = 1 + sec x = sec x + sec x cos x = sec x + 1 1 + sec x L.S. = R.S. b) sec x = tan x csc x L.S. = R.S. c) tan x sin x + cos x = sec x L.S. = R.S.

15. d) sin 4 x - cos 4 x = 1 - 2cos 2 x = (sin 2 x - cos 2 x)(sin 2 x + cos 2 x) = (1 - cos 2 x - cos 2 x) = 1 - 2cos 2 x L.S. = R.S. 1 - 2cos 2 x e) L.S. = R.S. Proving an Identity 5.4.9

16. Proving an Identity 5.4.10 f) L.S. = R.S.