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Syllabus

Trigonometric Functions — Syllabus

CBSE · Class 11 · Mathematics

What Trigonometric Functions covers in CBSE Class 11 Mathematics: 4 topics, for the 2026-27 session. Part of the CBSE Class 11 Mathematics syllabus.

160 questions64 flashcards27 formulas & key relations5 concepts

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4 Topics · CBSE Class 11 Mathematics · 2026-27

Topics in Trigonometric Functions

1

1. Angle Measure and Radian Measure

  • Angle is a measure of rotation of a given ray about its initial point.
  • Anticlockwise rotation gives a positive angle and clockwise rotation gives a negative angle.
  • One degree is one three-hundred-sixtieth part of a revolution.
2

2. Unit Circle Definition and Basic Values

  • For a point P(a, b) on the unit circle, cos x = a and sin x = b.
  • For every point on the unit circle, cos²x + sin²x = 1.
  • At quadrantal angles, the points on the unit circle are A(1, 0), B(0, 1), C(-1, 0), and D(0, -1).
3

3. Other Trigonometric Functions, Domains, Ranges, and Signs

  • cosec x = 1/sin x, sec x = 1/cos x, tan x = sin x/cos x, cot x = cos x/sin x.
  • sin x = 0 implies x = nπ, where n is any integer.
  • cos x = 0 implies x = (2n + 1)π/2, where n is any integer.
4

4. Trigonometric Identities and Formulas

  • cos(x + y) = cos x cos y − sin x sin y.
  • sin(x + y) = sin x cos y + cos x sin y.
  • tan(x + y) = (tan x + tan y)/(1 − tan x tan y), provided none of x, y, or x + y is an odd multiple of π/2.

Key Concepts

Central concept: Trigonometric Functions

Introduction and meaningAnglesAngle measuresUnit circle definitionQuadrantal anglesOther trigonometric functionsZeros and undefined valuesPythagorean identities

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Frequently Asked Questions

What are the important topics in Trigonometric Functions for CBSE Class 11 Mathematics?
Key topics in Trigonometric Functions include Angle Measure and Radian Measure, Unit Circle Definition and Basic Values, Other Trigonometric Functions, Domains, Ranges, and Signs, Trigonometric Identities and Formulas. Study these first, then practise questions on each for Class 11 exams.
How should I revise Trigonometric Functions for Class 11 exams?
Learn the core ideas first, then work through the 160 practice questions on Trigonometric Functions. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All CBSE Class 11 Mathematics Syllabus

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