# Introduction to Trigonometry Important Questions and Practice Set with Answers | NCERT Class 10 Mathematics | SwaVid

The chapter "Introduction to Trigonometry" in NCERT Class 10 Mathematics lays the foundation for understanding the relationship between the sides and an...

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# Introduction to Trigonometry

## In a right-angled triangle ABC, right-angled at B, if AB = 8 cm and BC = 15 cm, then the value of sin A is:

## Find the gaps before this chapter finds them for you.

## Related chapters

Chapter 8 · Class 10 Mathematics

The chapter "Introduction to Trigonometry" in NCERT Class 10 Mathematics lays the foundation for understanding the relationship between the sides and angles of a right-angled triangle. It introduces six trigonometric ratios (sine, cosine, tangent, cosecant, secant, and cotangent) for acute angles. Students learn to calculate these ratios, understand their reciprocal relationships, and apply them to specific angles like 0°, 30°, 45°, 60°, and 90°. The chapter also covers fundamental trigonometric identities, which are crucial for simplifying expressions and proving other trigonometric results. Mastery of these concepts is essential for further studies in mathematics and science.

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- NCERT Class 10 Mathematics textbook: Mathematics : Chapter 8: Introduction to Trigonometry

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