1. TABLE OF CONTENTS 29. TRIGONOMETRIC RATIOS

2. TRIG RATIOS STD: MM2G2 – DEFINE AND APPLY TRIG RATIOS TO RIGHT TRIANGLES EQ: - What are the 3 trig ratios?

3. VOCABULARY Trig ratio- ratio of the lengths of two sides of a right triangle

4. 3 BASIC TRIG RATIOS Sine (sin) Cosine (cos) Tangent (tan) Sin  Cos  Tan 

5. JUST REMEMBER CHIEF… SOHCAHTOA ininp ppoverppover ypotenuseypotenuse osos djoverdjover ypotenuseypotenuse anan p ppoverppover djacentdjacent

6. AA sin A= 12/13 cos A= 5/13 tan A= 12/5 BB sin B= 5/13 cos B= 12/13 tan B= 5/12 EX: FIND SIN, COS, & TAN OF  A &  B. C A B 13 12 5

7. EXAMPLE 30 60 __ 1 2 A B C sin A= ½ Find sin A Now use your calculator to check your answer Sin 30 o =1/2

8. TRIG RATIOS ON YOUR CALCULATOR When you plug trig ratios into your calculator, you need to round to 4 decimal places Examples Sin 37 o cos 37 o Tan 14 o Sin 88 o Cos 85 o