This document discusses derivatives of trigonometric functions. It provides the derivatives of sinx, cosx, secx, cscx, tanx and cotx. It also gives an example of differentiating x^3 sinx and y = 1 - sinx. Finally, it assigns practice problems from pages 215-217, problems 3, 5, 9, 19, and 29.

1. Derivatives of Trig Functions
Let's practice what we've learned ...
Given the values in the table

2. Derivative of Trigonometric Functions ...
Let's start by looking at some graphs ...

3. existence of these two limits.

4. d sinx =
dx
d cosx =
dx
d secx =
dx
d cscx =
dx

5. d 1 =
dx f(x)
d tanx =
dx
d cotx =
dx

6. cosx
Ex. Differentiate: a) x3 sinx b) y = 1 - sinx

7. Assignment: p.215-217 #3, 5, 9, 19, 29