2. Inverse Trig Functions

3. Vocabulary Inverse Cosine Function (cos -1 ) – The function y=cos -1 x = Arccos x, if and only if x = cos y and 0 ≤ y ≤ π Inverse Sine Function (sin -1 ) – The function y=sin -1 x = Arcsin x, if and only if x = sin y and - π / 2 ≤ y ≤ π / 2 Inverse Tangent Function (tan -1 ) – The function y=tan -1 x = Arctan x, if and only if x = tan y and - π ≤ y ≤ π

4. Inverse Cosine Function

5. Inverse Sine Function

6. Inverse Tangent Function

7. All of These Mean the Same Thing

8. Finding Inverse Values Press 2 nd Press Trig button in equation (sin,cos,tan)

9. Examples

11. Solving for θ

15. Homework Inverse Trig Worksheet All odds, 26