RD Sharma Solutions Class 11 Trigonometric Ratios Of Multiple And Sub Multiple Angles

RD Sharma Solutions Class 11 Chapter 9

What is trigonometry

Trigonometry is derived from the Greek words “trigon” and “metron” meaning measuring the sides of a triangle. This subject was developed to solve geometric problems involving triangles.


Angle is a measure of rotation of a given ray about its initial point. The original ray is known as the initial side and the final position of the ray after rotation is called the terminal side.

This chapter “ Values of Trigonometric Ratios of Multiple and Submultiple Angles ” deals with expressing the values of trigonometric functions at multiples of “x” example 2x, 3x, 4x… etc.

R D Sharma solutions for class 11 is a complete study material for the students who are currently studying in 11th standard. This textbook is designed according to the latest syllabus prescribed by CBSE and in accordance with the guidelines of CCE.

Practise This Question

15 - (6 + 6 × 6) ÷ (9 + 5) = ?