1. Review: Find the missing measures. Write all answers in radical form.
30°
45° x 7 10 z
45° w
60° y

2. A ratio of the lengths of two sides in a right triangle.
Trig Ratio:
A ratio of the lengths of two sides in a right triangle.

3. The Trigonometric Functions we will be looking at
SINE
COSINE
TANGENT

4. The Trigonometric Functions
SINE
COSINE
TANGENT

5. SINE
Prounounced “sign”

6. Prounounced “co-sign”
COSINE
Prounounced “co-sign”

7. Prounounced “tan-gent”

8. Represents an unknown angle
Greek Letter q
Prounounced “theta”
Represents an unknown angle

9. hypotenuse
hypotenuse
opposite
opposite
adjacent
adjacent

10. We need a way to remember all of these ratios…

11. Some
Old
Hippie
Came A
Hoppin’
Through
Our
Old Hippie
Apartment

12. Sin
SOHCAHTOA
Opp
Hyp
Cos
Adj
Hyp
Tan
Opp
Adj
Old Hippie

13. Finding sin, cos, and tan

14. SOHCAHTOA 10 8 6

15. 10.8 9 A 6 Find the sine, the cosine, and the tangent of angle A.
Give a fraction and decimal answer (round to 4 places).
10.8 9 A 6

16. ? 5 4 3 Pythagorean Theorem: (3)² + (4)² = c² 5 = c
Find the values of the three trigonometric functions of . ?
Pythagorean Theorem: 5 4
(3)² + (4)² = c²
5 = c 3

17. 24.5 8.2 23.1 Find the sine, the cosine, and the tangent of angle A
Give a fraction and decimal answer (round to 4 decimal places). B
24.5
8.2 A
23.1