1. Trig Ratios and Cofunction Relationships

2. Trig Ratios SOH-CAH-TOA

3. SINE Pronounced “sign”

4. Pronounced “co-sign” COSINE

5. Pronounced “tan-gent” TANGENT

6. Pronounced “theta” Greek Letter  Represents an unknown angle

7. opposite hypotenuse adjacent hypotenuse opposite adjacent

8. Finding sin, cos, and tan. Just writing a ratio.

9. 1. Find the sine, the cosine, and the tangent of theta. Give a fraction. 35 12 37 Shrink yourself down and stand where the angle is. Identify your hypotenuse, adjacent side, and opposite side. H A O

10. 2. Find the sine, the cosine, and the tangent of theta 24.5 23.1 8.2 Shrink yourself down and stand where the angle is. Identify your hypotenuse, adjacent side, and opposite side. H A O

11. Sin-Cosine Cofunction

12. The Sin-Cosine Cofunction

13. 3. What is sin A? 4. What is Cos C?

14. 5. What is Sin Z? 6. What is Cos X?

15. 7. Sin 28 = ?

16. 8. Cos 10 = ?

17. 9.  ABC where  B = 90. Cos A = 3/5 What is Sin C?

18. 10. Sin  = Cos 15 What is  ?

19. Draw  ABC where  BAC = 90  and sin B = 3/5 11. What is the length of AB? 12. What is tan C? 4 4/3

20. 13. Draw stick-man standing where the angle is and mark each given side. Then tell which trig ratio you have. O H sin

21. Classwork SPW 16.4

22. Homework Worksheet