1. 8-4 Trigonometry
Ms. Andrejko

2. SOH – CAH - TOA Notes/Vocab Trigonometry- triangle measure
Trigonometric Ratio- the ratio of the lengths of the sides of a right triangle
NOTE: If you are trying to get an angle measure as your answer, you must use sin-1, cos-1, tan-1.
SOH – CAH - TOA

3. USING THE CALCULATOR!!!

4. USING THE CALCULATOR!!!

5. CHECK MODE BEFORE STARTING!!!
On the calculator type in:
Sin 90
Did you get 1?

6. Just to get you thinking…b c
Sin <B =
Cos <B =
Tan <B = a c b a

7. Examples
Find sin L, cos L, tan L, sin M, cos M, and tan M. Express each ratio as a fraction and as a decimal to the nearest hundredth.

8. Practice

9. Examples
Find x. Round to the nearest hundredth.

10. Practice

11. Examples

12. Practice