00:00:43 Derivation for half angles, sin(x/2), cos(x/2) and tan(x/2)

00:12:03 Chapter 3 Example 27

00:18:03 Chapter 3 Example 28

00:36:43 Chapter 3 Miscellaneous Exercise Question 8

00:43:23 Chapter 3 Miscellaneous Exercise Question 9

00:47:43 Chapter 3 Miscellaneous Exercise Question 10

00:57:13 Chapter 3 Example 29