If you are struggling with a concept of a section in this chapter you can listen to the podcast from the section to help you better understand the concept.
13-1 Trigonometric Identities
13-2 Verifying Trigonometric Identities
13-3 Sum and Difference of Angles Identities
Notes Section 13-3
13-4 Double-Angle and Half-Angle Identities
Notes Section 13-4
13-5 Solving Trigonometric Equations
Notes Section 13-5