1. Trigonometric identities and equations Sum and difference identities
7-3
Trigonometric identities and equations
Sum and difference identities

2. Objectives
Use the difference identities for the sine, cosine, and tangent functions.

3. Warm-up

4. Check Up

5. Sum and Difference Identities for Cosine Functions

6. Example 1

7. Example 1 Cont.

8. You Try!!!

9. You Check!!!

10. Example 2

11. You Try!

12. You Check!!!

13. Sum and Difference Identities for Sine Functions

14. Example 3

15. You Try!!!

16. You Check!!!

17. Sum and Difference Identities for Tan Functions

18. Example 4

19. You Try!!!

20. You Check!!!

21. Example 5

22. You Try!!!