1. NOTES: INVERSES
SohCahToa Given an angle measurement, Sin, Cos, and Tan are used to solve for a missing side of a right triangle.
What if we need to solve for angles?

2. Inverse Trig Functions: Given side measurements, inverses are used to solve for a missing angle in a right triangle.

3. sinθ/cosθ/tanθ: angleside ratio
Summary
sinθ/cosθ/tanθ: angleside ratio
sin-1θ/cos-1θ/tan-1θ: side ratioangle 3

4. Calculator Tips:
Carry decimals through to the last step (only round off for final answer.)
Use parentheses when solving for sin-1θ, cos-1θ, tan-1θ in calculator. 3.

5. Calculator Tips:
3. Use given (exact) values when solving. Try to avoid using rounded off decimal answers when making additional calculations.
Use parentheses when solving for sin-1θ, cos-1θ, tan-1θ in calculator.

6. Refer to chart on page 305
for #5, 6, and 15-21

7. ↓Find all missing sides and angles!!

8. Check even answers p.309: