1. Trig Ratios and Cofunction Relationships

2. Trig Ratios SOH-CAH-TOA

3. SINE
Pronounced “sign”

4. COSINE
Pronounced “co-sign”

5. Pronounced “tan-gent”

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

7. hypotenuse
hypotenuse
opposite
opposite
adjacent
adjacent

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

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

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

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.
sin H O

21. Classwork
SPW 16.4

22. Homework
Worksheet