• Apr 3, 2026 the ark of mathematics part 2 proving trigonometr ing complex trigonometric problems. 1. Sine Sum Formula \[ \sin(\alpha + \beta) = \sin \alpha \cos \beta + \cos \alpha \sin \beta \] Proof: Geometric Approach: Construct two right triangles with angles \(\alpha\) and \(\beta\). Use coordinate geometry to express the points on the uni By Lynette Boyle
