Chapter 8: Introduction to Trigonometry

Class 10 CBSE - Master trigonometric ratios, values of standard angles, and identities.

About This Chapter

Learn sine, cosine, tangent and their reciprocals. Master values at 0°, 30°, 45°, 60°, 90° and prove trigonometric identities.

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Chapter Sections

1

Concrete Introduction

Real-world applications.
2

Introduction to Trigonometry

Basics of trigonometry.
3

Trigonometric Ratios

sin, cos, tan, cot, sec, cosec.

sin θcos θtan θ
4

Ratios of Specific Angles

Values at 0°, 30°, 45°, 60°, 90°.

Standard Angles
5

Complementary Angles

sin(90°-θ) = cos θ.

Complementary
6

Trigonometric Identities

sin²θ + cos²θ = 1.

Identities
7

Exercise 8.1

Practice problems.
8

Exercise 8.2

Practice problems.
9

Exercise 8.3

Practice problems.
10

Summary

Chapter summary.
11

Enhanced Curriculum Support

Additional resources.