1. Trigonometric Identities Section 4.3

2. Objectives Use algebra to simplify trigonometric expressions Establish identities

3. An identity is a mathematical relationship equating one quantity to another (which may initially appear to be different). An equation that is not an identity is called a conditional equation.

5. Even-Odd Identities

6. Page 243 #9

7. Page 243 #11

8. Page 243 #13

9. Page 243 #19

10. Page 243 #27

11. Page 244 #53

12. Page 243 (10-36 even) ====================== Pages 243-244 (38-60 even) ====================== Page 244 (62-88 even)