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ICSEICSE.Class9.Math.TrigonometryRatiosICSE-2024

Trigonometric ratios and identities (introduction)

CISCE (ICSE)·math·Grade 9·Bloom: Apply·Last verified: May 17, 2026

Define the six trigonometric ratios (sin, cos, tan, cosec, sec, cot) for acute angles in a right triangle. Use them to find unknown sides and angles.

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Concepts covered (20)

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Apply Pythagorean Theorem
triangles · math · Grade 9
Calculate Altitude Of A Triangle
triangles · math · Grade 9
Use Properties Of Angles In Triangles
triangles · math · Grade 9
Solve Problems Involving Triangle Properties
triangles · math · Grade 9
Identify Special Triangles
triangles · math · Grade 9
Properties of Triangles
triangles · math · Grade 9
Calculating Arc Lengths
circles · math · Grade 9
Exploring Properties of Triangles
triangles · math · Grade 9
Construct Triangles With Given Conditions
triangles · math · Grade 9
Applying Trigonometric Ratios
geometryHS · math · Grade 9
Work With Angles
geometryHS · math · Grade 9
Explore Trigonometric Ratios
geometryHS · math · Grade 9
Classify Triangles By Angles
triangles · math · Grade 9
Calculate Angles Using Algebra
linesAndAngles · math · Grade 9
Solve Problems Involving Angles
linesAndAngles · math · Grade 9
Finding Arc Lengths
circles · math · Grade 9
Calculate Triangle Area
triangles · math · Grade 9
Solve Problems Using Triangle Properties
triangles · math · Grade 9
Calculate Altitude Length
triangles · math · Grade 9
Construct Triangles With Given Conditions
triangles · math · Grade 9

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