00:02:00 Basics of unit circle in trigonometry

00:10:50 Signs of trigonometry ratios in different quadrants and at different angles

00:19:11 Shortcut trick to remember signs of trigonometry ratios in different quadrant

00:22:01 NCERT Exercise 3.2 Question 1

00:26:31 NCERT Exercise 3.2 Question 2

00:29:01 NCERT Exercise 3.2 Question 3

00:31:21 NCERT Exercise 3.2 Question 4

00:33:31 NCERT Exercise 3.2 Question 5

00:36:31 Relationship between trigonometric ratios of positive and negative angles