1. Trigonometry Ratios

2. Example 1 Write the Trig Ratio for each of the following
( soh, cah, toa)

3. Example 2 Write each ratio as a fraction and decimal ( soh, cah, toa)
change to B

4. Solving Right Triangles : Inverse Functions
When you are finding an angle measurement,
you must use…
_________________________ keys (_________)
inverse

5. Example 3 Find the acute angles: ****Write as a ratio FIRST****
Change to DEGREE in Calculator
( soh, cah, toa)

6. Example 4 Find all unknown measures:
(find both acute angles and missing side. )
( soh, cah, toa)
Find angles: use inverse key _______________
Find : use Pythagorean Theorem

7. To completely solve a right triangle you must have:
_________________ OR
______________________________________
2 sides lengths
One side length and one acute angle

8. Example 5
Find
Steps: 1. 2.
Set up: 3.
Substitute:
Solve for x 4.