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Trigonometry

Telangana Board · Class 10 · Mathematics

Quick revision notes for Trigonometry — Telangana Board Class 10 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

45 questions20 flashcards4 concepts

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Key Topics to Revise

1

Introduction and Naming Sides in Right Triangles

  • Trigonometry helps measure heights, distances, and slopes using triangle properties
  • In a right triangle ABC with right angle at B: AC is hypotenuse, BC is opposite side to angle A, AB is adjacent side to angle A
  • The hypotenuse is always the longest side opposite to the right angle
2

Trigonometric Ratios

  • Six trigonometric ratios: sin, cos, tan, cosec, sec, cot
  • First three (sin, cos, tan) are primary ratios
  • Last three (cosec, sec, cot) are reciprocals of the first three
3

Trigonometric Ratios of Specific Angles

  • Standard angles: 0°, 30°, 45°, 60°, 90°
  • Values derived from special triangles: 45°-45°-90° and 30°-60°-90°
  • sin 0° = 0, sin 30° = 1/2, sin 45° = 1/√2, sin 60° = √3/2, sin 90° = 1
4

Trigonometric Ratios of Complementary Angles

  • Two angles are complementary if their sum is 90°
  • sin (90° - A) = cos A and cos (90° - A) = sin A
  • tan (90° - A) = cot A and cot (90° - A) = tan A

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Full Notes

Key Concepts

In a right triangle ABCKey trigonometric valuesFor complementary angles (angles that sumFundamental identities

Frequently Asked Questions

What are the important topics in Trigonometry for Telangana Board Class 10 Mathematics?
Trigonometry covers several key topics that are frequently asked in Telangana Board Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Trigonometry — Telangana Board Class 10 Mathematics?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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 14 chapters — Telangana Board Class 10 Mathematics Revision Notes

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