1. Lesson: Derivative Techniques 2  Obj - Derivatives of Trig Functions

2. Trig Essentials SOHCAHTOA

3. Now, let’s examine the trig function graphs

8. Practice!

9. Other trig values

11. Basic Trig Identities

12. Trig Derivative Equations : 1. 2.

13.  What about Tangent, Cotangent, Secant, and Cosecant? Let’s derive them!  Use quotient rule:

15.  Therefore,

16.  Now try:

17.  So, 1. 2. 3. 4. 5. 6.

18. O.K., How do I remember all that?  Look at the cofunctions The derivative of any cofunction can be obtained from the derivative of the corresponding function by taking the negation and replacing each function in the derivative with its cofunction.

19. EX. 1: Find dy/dx if

20. EX. 2: Find dy/dx if

21. EX.3 : Find

22. EX. 4 : Find