Trigonometric ratios of compound angles

Trigonometric ratios of compound angles

1. Compound angles

When we add or subtract angles, the result is called a compound angle. i.e.,the algebraic sum of two or more angles are called compound angles

For example, If A, B, C are three angles then A ± B, A + B + C, A – B + C etc., are compound angles.

2. Sum and difference formulae of sine, cosine and tangent

3. Trigonometric ratios of multiple angles