NCERT Class 10 Math Chapter 8: त्रिकोणमिति का परिचय PDF Download

NCERT Class 10 Math Chapter 8 त्रिकोणमिति का परिचय (Introduction to Trigonometry) is one of the most important chapters in the Class 10 syllabus. It explains the basics of trigonometry by introducing students to the concepts of trigonometric ratios, their values at specific angles, and the fundamental relationships between them. This chapter also helps in

NCERT Class 10 Math Chapter 8 त्रिकोणमिति का परिचय (Introduction to Trigonometry) is one of the most important chapters in the Class 10 syllabus. It explains the basics of trigonometry by introducing students to the concepts of trigonometric ratios, their values at specific angles, and the fundamental relationships between them. This chapter also helps in understanding how trigonometry connects algebra with geometry and is widely used in higher studies and competitive exams. With proper practice, students can easily master these formulas and score full marks in this section.

I am writing about this chapter because trigonometry is a milestone in a student’s mathematics journey. Many students initially find the terms sine, cosine, and tangent confusing, but once they understand the ratios with the help of right-angled triangles, things become much clearer. The chapter is not only essential for board exams but also forms the base for advanced concepts in Class 11 and 12, like calculus and coordinate geometry. Personally, I have seen how regular practice of NCERT examples makes students confident in solving tricky questions. That is why having the PDF of this chapter is very important, as it allows students to revise formulas anytime and improve their preparation.

Key Topics in Chapter 8 त्रिकोणमिति का परिचय

Some of the main concepts taught in this chapter are:

Understanding the meaning of trigonometry and its applications
Definition of trigonometric ratios (sine, cosine, tangent, cosecant, secant, cotangent)
Ratios of standard angles like 0°, 30°, 45°, 60°, and 90°
Trigonometric identities and their proofs
Solving problems using trigonometric values

Example for Better Understanding

Consider a right-angled triangle ABC with ∠B = 90°. If AB = 3 and AC = 5, then BC = 4 by Pythagoras theorem. Now,
sin A = (opposite side / hypotenuse) = 4/5
cos A = (adjacent side / hypotenuse) = 3/5
This simple example shows how trigonometric ratios are directly linked to sides of a triangle.

Download PDF

Students can download NCERT Class 10 Math Chapter 8: त्रिकोणमिति का परिचय PDF from this website.

NCERT Class 10 Math Chapter 14: प्रायिकता PDF Download

NCERT Class 10 Math Chapter 14 प्रायिकता (Probability) introduces students to the concept of chance and likelihood of events. In this chapter, students learn how to calculate the probability of simple events using the formula P(E) = Number of favourable outcomes ÷ Total number of outcomes. The chapter deals with real-life examples like tossing a

NCERT Class 10 Math Chapter 14 प्रायिकता (Probability) introduces students to the concept of chance and likelihood of events. In this chapter, students learn how to calculate the probability of simple events using the formula P(E) = Number of favourable outcomes ÷ Total number of outcomes. The chapter deals with real-life examples like tossing a coin, rolling a dice, or drawing cards, which makes the subject more interesting and practical. Since probability questions are common in board exams and are generally considered easy, this chapter is highly important for scoring well.

I am writing about this topic because probability is not only an important part of the Class 10 syllabus but also a concept that students will use in higher studies and real life. From predicting weather conditions to calculating risks in business, probability plays a key role. Many students initially find it confusing, but NCERT presents it in a simple and easy-to-understand manner. By practising from the NCERT book, students can build a strong foundation and develop confidence in solving probability problems. Having the PDF makes it easier for learners to access the chapter anytime, revise formulas, and attempt practice questions before exams.