1. Warm – up
Find the sine, cosine and tangent of angle c.

2. Solving Right Triangles

3. Vocabulary
Solve a right triangle – to determine the measures of all six parts (3 angles, 3 sides).

4. Inverse Trig Ratios
We use the inverse sine, inverse cosine, and inverse tangent if we are trying to find angle measures.
The calculator buttons look like this:
sin-1
cos-1
tan-1

5. Example 1
Find the acute angles of the triangle. Round to the nearest tenth.

6. Try This!
Find the acute angles of the triangle. Round to the nearest tenth.

7. Example 2
Solve the right triangle.

8. Try This!
Solve the right triangle.