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Trigonometry is a greek word where 'trignon' means ''triangle'' and 'metron' means ''measure''.
A trigonometry is a branch of mathematics which help us to understands the relationship involving the length and angles of triangles. There are six functions of an angle commonly used in trigonometry, the names and abbreviation are sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc).
In this chapter we will study the following topics-
-trigonometric ratios
-trigonometric ratios of some specific angles,
-trigonometric ratios of complementary angles,
-trigonometric identities

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### Lecture 15: Trigonometry Part- 15

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Trigonometry is a greek word where 'trignon' means ''triangle'' and 'metron' means ''measure''.
A trigonometry is a branch of mathematics which help us to understands the relationship involving the length and angles of triangles. This chapter we will concentrate on the heights and distance of trigonometry.

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### Lecture 4: Some Application Of Trigonometry Part- 3

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Published    14-Jun-2017      Bilingual

## INTRODUCTION TO TRIGONOMETRY - MATHEMATICS CBSE CLASS 10TH

Study Khazana delivers CBSE Class 10th Maths, nineteen video lectures on Introduction to Trigonometry with complete solutions using sample paper based on NCERT Syllabus. This chapter covers the following topic to make students understand the topic and covers the whole chapter with all the question and answers.

## WHAT DO YOU STUDY IN INTRODUCTION TO TRIGONOMETRY?

• Trigonometric ratios of an acute angle of a right-angled triangle
• Proof of their existence (well defined); motivate the ratios, whichever are defined at 0° and 90°.
• Values (with proofs) of the trigonometric ratios of 30°, 45° and 60° Relationships between the ratios

## HOW WE HELP THE STUDENTS???

These video lectures will make the subject easy for students. The free lecture is available as a demo. It will include question and answers of the students undertaken during the class. CBSE Class 10th previous question papers and sample papers are also given to the students for practice. Video Lectures classes are taken by Study Khazana’s best faculties. Video lectures contain examples and formulas related to different topics. We have doubt sessions on YouTube related to students queries asked on WhatsApp. These classes are based on NCERT Syllabus. We offer pen drives and online-offline study mode to the students. We also have Android and IOS Study Khazana mobile app for helping students to study anywhere at any time.

#### Sameer Kohli

 Phone: 85********24 Email: sam********@gmail.com Address: 319,Joshi Road Karol Bagh, Institute:

##### About Us

Mr. Kohli, founder of Jupiter Education Planet, is a visionary in the field of education and holds an experience of more than 15 years as a Mathematics and Science teacher. Owing to his student-friendly teaching style, he has been able to build an unflinching reputation for himself. He is not only an excellent teacher who has delivered exceptional results throughout his career, but also has a deep insight into child and parent psychology. Over the years, he has acquired expertise in the areas of motivation and counselling of parents and children to help them take better decisions. With a passion to change lives for the better, Mr. Kohli knows the right approach to help children in optimum decision making at both personal and professional level.

##### Qualification

B.Sc. (Hon.) (D.U.)

10 years

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