Class 10 Maths — Chapter 8: TRIGONOMETRY
Free AI tutor + NCERT notes for Chapter 8: TRIGONOMETRY. 6 topics covered. Ask any question by voice or text in Hindi or English.
What you'll learn
- ▸Identifying Sides Relative to an Acute Angle
- ▸The Six Trigonometric Ratios
- ▸Reciprocal Identities
- ▸Quotient Identities
- ▸Invariance of Trigonometric Ratios
- ▸Calculating All Ratios from One Given Ratio
Chapter Summary
--- PAGE 1 --- 1062CH08 INTRODUCTION TO 8 TRIGONOMETRY There is perhaps nothing which so occupies the middle position of mathematics as trigonometry. – J.F. Herbart (1890) 8.1 Introduction You have already studied about triangles, and in particular, right triangles, in your earlier classes. Let us take some examples from our surroundings where right triangles can be imagined to be formed. For instance : 1. Suppose the students of a school are visiting Qutub Minar. Now, if a student is looking at the top of the Minar, a right triangle can be imagined to be made, as shown in Fig 8.1. Can the student find out the height of the Minar, without actually measuring it? Fig. 8.1 2. Suppose a girl is sitting on the balcony of her house located on the bank of a river. …
Practice Questions from this Chapter
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- Explain trigonometry simply. Get Solution →
- Show real-world angle uses. Get Solution →
- Calculate a right triangle's side. Get Solution →
- What does the Greek word 'tri' mean, as used in the word 'trigonometry'? Get Solution →
- In a right triangle ABC, how is the 'sine of ∠A' defined? Get Solution →
- Which trigonometric ratio is the reciprocal of cos A? Get Solution →
- According to the text, tan A is equal to which of the following ratios? Get Solution →
- Who was the first person mentioned in the text to use the abbreviated notation 'sin'? Get Solution →
Did you know?
- 💡 The ancient Egyptians used early trigonometry to build the massive pyramids.
- 💡 Your phone's GPS uses trigonometry to figure out your exact location.
- 💡 Music and sound waves are often modeled using trigonometric functions.
- 💡 Triangles are the only rigid polygon, making them super strong in buildings.
- 💡 Sailors navigate by calculating angles to stars using trigonometry.
Frequently Asked Questions
How many topics are covered in this chapter?
This chapter covers 6 key topics: Identifying Sides Relative to an Acute Angle, The Six Trigonometric Ratios, Reciprocal Identities, Quotient Identities, Invariance of Trigonometric Ratios, and more. The BrainWeave AI tutor explains each one with examples.
Is Chapter 8: TRIGONOMETRY important for board exams?
Yes — Class 10 is a CBSE board exam year, and every NCERT chapter is part of the syllabus. Use BrainWeave's AI tutor to master this chapter, then practice with the auto-generated quizzes and mind maps.
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