Section 5.2 [ATTACH=full]1312[/ATTACH] [ATTACH=full]1317[/ATTACH] [ATTACH=full]1318[/ATTACH]
I hate to give myself credit for proving easy trigonometric identities. Solving tougher problems separates me from anyone who can do problems 26 and 30. Check out this link: Verifying Trigonometric Identities...5