Trigonometric Functions Class 11 Notes – Chapter 3
Trigonometry deals with the relationship between the angles and sides of the triangles. It is derived from ‘trigon’ and ‘metron’ (Greek words) that means the measurement of the sides of a triangle. An angle is the measurement of the rotation of a revolving line w.r.t to a fixed line. The angle has +ve or -ve values depending on its rotation [-ve for clockwise rotation and +ve for anti-clockwise rotation]. Please refer Trigonometric Functions Class 11 Notes for more revision notes.
CBSE Revision Notes 