1. Section 3.1 – The Inverse Sine, Cosine and Tangent Functions Continued

2. Horizontal line test – tan x is not one-to-one

3. If we limit the domain of the tangent function to be (–π/2, π/2) we have a function that is one-to-one…it will have an inverse.

4. The inverse tangent of x

7. Find the value in (–π/2, π/2) whose tangent is

8. Section 3.2 The Inverse Trigonometric Functions [Continued]

9. Remaining Inverse Trig Functions

11. 1 4 y x y

12. So, we need to find

13. 1 1 x y We know

14. But we (most likely) do not have a sec button on our calculator, so