ocr: Double-Angle Formulas sin 2A =2s sin A COSA COS2A == COS2A- - - sin- A -2cos-A-1 -1-2sin2A - - - 2tan 1-tan2A A tan2A = Half-Angle Formulas sin - 4-4 1-COSA 2 - - l - - cos: - la - - - - - - A A 2 1+COSA 2 u - fwed ( - - A - tan 2 A - sin 1-COSA A sinA 1+CoSA Click to see an example Multiple Angle Formulas
