Introduction to Trigonometry | 10th Maths Chapter with Basics and Identities

Topic : Exercises 1
Chapter : Introduction to Trigonometry
Class : 10th
Subject : Maths
NCERT/CBSE

This chapter introduces you to the world of Trigonometry—the study of angles and sides in right-angled triangles.

Key definitions:

Trigonometric Ratios: Ratios of the sides of a right triangle with respect to an angle.

sin θ = perpendicular/hypotenuse

cos θ = base/hypotenuse

tan θ = perpendicular/base

Reciprocal identities: cosec θ = 1/sin θ, sec θ = 1/cos θ, cot θ = 1/tan θ

Trigonometric identities: Fundamental equations like

sin²θ + cos²θ = 1

This chapter builds the base for higher-level maths and physics. Perfect for board prep!

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