CHAPTER AT A GLANCE
Trigonometry is the study of relationships between the sides and angles of a right angled triangle.
2. Trigonometric Ratios
Trigonometric ratios of an acute angle in a right triangle express the relationship between the angle and the length of its sides.
Let ABC be a triangle right angled at B. Then the trigonometric ratios of the angle A in right DABC are defined as follows:
4. Trigonometric Ratios of Complementary Angles:
We have the following relationship for complementary angles :
5. Trigonometric Identities :
An equation involving trigonometric ratios of an angle is called a trigonometric identity, if it is true for all values of the angle(s) involved
- Class 10 Notes
- CBSE Class 10 Maths Notes
- NCERT Solutions for class 10th Maths Chapter 8 Introduction to Geometry