1. Chapter 5 Analytic Trigonometry 1

2. 5.2 Verifying Trig Identities Objective:  Verify trigonometric identities. 2

3. Identity  An identity is an equation that is true for all real values in the domain of the variable.  When verifying an identity, we cannot assume the two sides of the equation are equal. We are trying to prove that they are the same. 3

4. Guidelines for Verifying Trig Identities 4

5. Example 1  Verify the identity. 5

6. Example 2  Verify the identity. 6

7. Example 3  Verify the identity. 7

8. Example 4  Verify the identity. 8

9. Example 5  Verify the identity. 9

10. Example 6  Verify the identity. 10

11. Example 7  Verify the identity. 11

12. Example 8  Verify the identity. 12

13. Homework 5.2  Worksheet 5.2 13