The chapter Introduction to Trigonometry for class 10 has been covered in the following lectures:

1. Introduction to Trigonometry & Trigonometric Ratios
2. NCERT example Questions Q1 to Q5
3. Exercise 8.1 Q1 to Q6
4. Exercise 8.1 Q7 to Q11
5. Trigonometric Ratios of some specific angles
6. NCERT example Questions Q6 to Q8
7. Exercise 8.2
8. Trigonometric Identities
9. Exercise 8.3 Q1 to Q3
10. Exercise 8.3 Q4
11. Formula/concept list (pdf)
12. Quiz 1
13. Quiz 2