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Chapter 3MathematicsCBSE Class 11

Trigonometric Functions

Trigonometric Functions is Chapter 3 of NCERT Class 11 Mathematics. The chapter covers Introduction, Angles, Trigonometric Functions, Trigonometric Functions of Sum and Difference of Two Angles. Use this public guide to revise the official topic structure before asking Lerno for step-by-step help.

4 topicsChapter 3 of 14
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Topics covered

4 sections
01

Introduction

Introduction
02

Angles

IntroductionDegree measureRadian measureRelation between radian and real numbersRelation between degree and radian
03

Trigonometric Functions

IntroductionSign of trigonometric functionsDomain and range of trigonometric functions
04

Trigonometric Functions of Sum and Difference of Two Angles

Introduction

Key concepts

IntroductionAnglesTrigonometric FunctionsTrigonometric Functions of Sum and Difference of Two AnglesIntroductionDegree measureRadian measureRelation between radian and real numbersRelation between degree and radianSign of trigonometric functions

Practice questions

Frequently asked

What is covered in Trigonometric Functions?

Trigonometric Functions is Chapter 3 in NCERT Class 11 Mathematics. The verified chapter structure includes Introduction, Angles, Trigonometric Functions, Trigonometric Functions of Sum and Difference of Two Angles.

How should I revise Trigonometric Functions?

Revise the chapter topic by topic: start with Introduction, Angles, Trigonometric Functions, then practice questions that mix definitions, examples, and application steps.

Can I use Lerno for Class 11 Mathematics questions?

Yes. Lerno is built for CBSE students and uses NCERT-grounded context so students can ask for explanations, practice prompts, and step-by-step guidance for this chapter.

Study prompts

1

Explain Introduction from Trigonometric Functions and give one NCERT-style example or practice step.

2

Explain Angles from Trigonometric Functions and give one NCERT-style example or practice step.

3

Explain Trigonometric Functions from Trigonometric Functions and give one NCERT-style example or practice step.

4

Explain Trigonometric Functions of Sum and Difference of Two Angles from Trigonometric Functions and give one NCERT-style example or practice step.

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Practice QuestionsChapter-wise NCERT-aligned questionsSolutions GuideStep-by-step approach per topicChapter ExplanationTopic map for structured revision

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