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Syllabus

Trigonometry — Syllabus

Kerala Board · Class 10 · Mathematics

What Trigonometry covers in Kerala Board Class 10 Mathematics: 4 topics, for the 2026-27 session. Part of the Kerala Board Class 10 Mathematics syllabus.

45 questions22 flashcards13 formulas & key relations5 concepts

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4 Topics · Kerala Board Class 10 Mathematics · 2026-27

Topics in Trigonometry

1

Special Right Triangles and Their Properties

  • In a 45°-45°-90° triangle, both shorter sides are equal and the hypotenuse is √2 times the shorter side
  • In a 30°-60°-90° triangle, sides are in the ratio 1 : √3 : 2
  • These ratios remain constant regardless of the triangle's size
2

Trigonometric Ratios - Definitions and Basic Values

  • Sine (sin) = Opposite side / Hypotenuse
  • Cosine (cos) = Adjacent side / Hypotenuse
  • Tangent (tan) = Opposite side / Adjacent side
3

Standard Trigonometric Values

  • sin 0° = 0, sin 30° = 1/2, sin 45° = 1/√2, sin 60° = √3/2, sin 90° = 1
  • cos 0° = 1, cos 30° = √3/2, cos 45° = 1/√2, cos 60° = 1/2, cos 90° = 0
  • tan 0° = 0, tan 30° = 1/√3, tan 45° = 1, tan 60° = √3, tan 90° = undefined
4

Heights and Distances - Problem Solving

  • Most problems involve finding height of objects (trees, buildings, towers)
  • Key elements: observer's height, distance from object, angle of elevation/depression
  • Always draw a clear diagram showing all given information

Key Concepts

In 45°sin θ = opposite side/hypotenusecos θ = adjacent side/hypotenusetan θ = opposite side/adjacent sideAngle of elevation is measured upward

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Frequently Asked Questions

What are the important topics in Trigonometry for Kerala Board Class 10 Mathematics?
Key topics in Trigonometry include Special Right Triangles and Their Properties, Trigonometric Ratios - Definitions and Basic Values, Standard Trigonometric Values, Heights and Distances - Problem Solving. Study these first, then practise questions on each for the Kerala Board Class 10 board exam.
How should I revise Trigonometry for the Kerala Board Class 10 board exam?
Learn the core ideas first, then work through the 45 practice questions on Trigonometry. 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.

More resources for Trigonometry

All Kerala Board Class 10 Mathematics Syllabus

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