Chapter
7 Values of Trigonometric Functions at Sum or Difference of Angles

RD Sharma
Solutions for Class 11 Maths Chapter 7
Values of Trigonometric Functions at Sum or Difference of Angles

An angle made up of the algebraic sum of two or more angles is called a compound angle. For example, if A, B, C are three angles then A ± B, A + B + C, A – B + C etc., are compound angles.