Trigonometry: Introductory Videos Introduction to Trigonometry (For All Boards): Class 10: Part 1 In this section we will try to understand: 1) What is trigonometry and 2) the basic terms involved in the trigonometry like sin, cos, tan, cot, sec and cosec. Introduction to Trigonometry (For All Boards): Class 10: Part 2 In this video, I am trying to explain the basic meaning and definition of sin, cos, tan, cot, sec and cosec. I n troduction to Trigonometry (For All Boards): Class 10: Part 3 In this video you will learn how to remember trigonometric ratios. Introduction to Trigonometry (For All Boards): Class 10: Part 4 In this video you will learn about trigonometric table. You will also learn the technique to remember the values inside the table. Introduction to Trigonometry (For All Boards): Class 10: Part 5 Learn the technique to know how to remember trigonometric table. Introduction to Trigonometry (Fo...