1. Warm Up

2. Equations of Tangent Lines September 10 th, 2015

3. Tangents to Curves

5. STEPS to finding Equation of TL Step 1: Find the derivative Step 2: Evaluate at the given value Step 3: Use as your slope Step 4: Plug value into original to get a y-value Step 5: Write the equation of a line

6. Example

9. Finding points on Tangents Horizontal tangents have a slope = 0 Set equal to the slope value & solve for x values Plug x values back into original to find the points

10. Example

13. Examples

15. How to find the tangent on calculator….

16. Example 20.5--1g On calc

17. Homework Pg. 599-600 Ex. 20.4 (all) Pg. 604 Ex. 20.5 (#2-4)