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Formula Sheet

Trigonometric Ratios Of Some Special Angles

NIOS · Class 10 · Maths

All formulas from Trigonometric Ratios Of Some Special Angles in NIOS Class 10 Maths. Key equations, constants, and identities for board exam preparation.

36 questions24 flashcards5 concepts

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A labeled diagram showing a right-angled isosceles triangle (angles 45°, 45°, 90°) with sides 'a' and hypotenuse 'a√2', used to derive sine, cosine, and tangent for 45 degrees.
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18 Formulas · 4 Sections

Formulas

Core definitions and right-triangle ratios

sin C = (side opposite to ∠C) / Hypotenuse

cosec C = Hypotenuse / (side opposite to ∠C)

cos C = (side adjacent to ∠C) / Hypotenuse

sec C = Hypotenuse / (side adjacent to ∠C)

tan C = (side opposite to ∠C) / (side adjacent to ∠C)

Special angles: 45°

OM = PM

OP^2 = OM^2 + PM^2

OP = √2·a units

Special angles: 30°

OP = OP′ = PP′ = 2a units

OM = √3·a units

sin 30° = 1/2

cos 30° = √3/2

tan 30° = 1/√3

Special angles: 60°

OP = PM′ = OM′ = 2a units

PM = √3·a units

sin 60° = √3/2

cos 60° = 1/2

tan 60° = √3

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Frequently Asked Questions

What are the important topics in Trigonometric Ratios Of Some Special Angles for NIOS Class 10 Maths?
Key topics in Trigonometric Ratios Of Some Special Angles include Trigonometric Ratios of Special Angles - Complete Overview, Complete Overview of Special Angles Chapter, Special Angles Trigonometric Ratios Overview. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Trigonometric Ratios Of Some Special Angles — NIOS Class 10 Maths?
Understand the core concepts first, then work through the 36 practice questions available for this chapter. Revise formulas and 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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