Description: Compound angle formulae express trigonometric functions of sums or differences of angles, facilitating calculations involving multiple angles within trigonometry.

Description: Ex.3.1(Continue Solution)

Description: Ex.3.2 solution

Description: Ex.3.3 solution

Description: Ex.3.3(Continue Solution 1)

Description: Ex.3.3(Continue Solution 2)

Description: The formulae convert trigonometric expressions of sums or differences into products, and vice versa, aiding in simplifying trigonometric equations and identities.

Description: Ex.3.4 solution

Description: Trigonometric functions of angles in a triangle relate ratios of its sides, such as sine, cosine, and tangent, fundamental in solving various geometrical problems.

Description: Ex.3.5(Continue Solution)