The chapter “Introduction to Trigonometry” in the UP Board Class 10 Maths Book introduces students to one of the most important mathematical concepts — Trigonometric Ratios. It explains how to define sine, cosine, tangent, cotangent, secant, and cosecant for acute angles in a right-angled triangle.
Students learn to find the values of these ratios and explore the fundamental trigonometric identities that form the base for solving complex problems. The chapter also includes tables of standard trigonometric values and examples showing their use in real-life problems involving heights and distances.
This chapter builds a strong base for higher studies in mathematics and physics by connecting geometry and algebra through angle-based relationships.