2. Some needed trig identities:

3. Trig Derivatives Graph y 1 = sin x and y 2 = nderiv (sin x) What do you notice?

4. Proof Algebraically (use trig identity for sin(x + h))

5. Proof Algebraically 0 1

6. Trig Derivatives Graph y 1 = cos x and y 2 = nderiv (cos x) What do you notice?

7. Proof Algebraically (use trig identity for cos(x + h))

8. Proof Algebraically 0 1

9. Other Trig Derivatives (quotient rule) (trig id cos 2 x + sin 2 x = 1)

10. Other Trig Derivatives (quotient rule)

11. Other Trig Derivatives (quotient rule)

12. Other Trig Derivatives (quotient rule)

13. Example Find an equation of the tangent line to the function f(x) = sec x at the point (slope)

14. Example Find the second derivative of y = csc x. (Product rule)