1. This is a trigonometric identity:

2. Your goal is to verify/prove the identity by manipulating one side of the equation until it looks like the other side.

3. This is a trigonometric identity: Your goal is to verify/prove the identity by manipulating one side of the equation until it looks like the other side. According to trig. ratios, you can rewrite

4. This is a trigonometric identity: Your goal is to verify/prove the identity by manipulating one side of the equation until it looks like the other side. By multiplying, you will get: According to trig. ratios, you can rewrite

5. This is a trigonometric identity: Your goal is to verify/prove the identity by manipulating one side of the equation until it looks like the other side. By multiplying, you will get: According to trig. ratios, you can rewrite

6. This is a trigonometric identity: Your goal is to verify/prove the identity by manipulating one side of the equation until it looks like the other side. By multiplying, you will get: According to trig. ratios, you can rewrite You just verified the identity.

7. So, Verification Format Looks like this:

8. Now let’s look at another one in proof format:

9. Prove:

10. 11 Given

11. 2 11

12. 2 11 2 Trig. Ratios

13. 2 11 Given 2 Trig. Ratios 3

14. 2 11 Given 2 Trig. Ratios 33 Division of Fractions

15. 2 11 Given 2 Trig. Ratios 33 Division of Fractions 4

16. 2 11 Given 2 Trig. Ratios 33 Division of Fractions 4 4 Multiplication

17. 4 5 4

18. 5 4 4 5 Trig. Ratios

19. 5 4 Multiplication 4 5 Trig. Ratios “See.................You can do a Trig. Proof”

20. 5 4 Multiplication 4 5 Trig. Ratios “See.................You can do a Trig. Proof” If you are asked to verify, just show the steps.

21. 5 4 Multiplication 4 5 Trig. Ratios “See.................You can do a Trig. Proof” If you are asked to verify, just show the steps. If you are asked to prove, include the reasons for each step.

22. 5 4 Multiplication 4 5 Trig. Ratios “See.................You can do a Trig. Proof” If you are asked to verify, just show the steps. If you are asked to prove, include the reasons for each step. That’s It !