Trigonometry
Write the given trigonometric expression in terms of α\alphaα only.
sin(30°+α)\sin\left(30\degree+\alpha\right)sin(30°+α)
cosα+3sinα2\frac{\cos\alpha+\sqrt3\sin\alpha}{2}2cosα+3sinα
cosα−3sinα2\frac{\cos\alpha-\sqrt3\sin\alpha}{2}2cosα−3sinα
sinα+3cosα2\frac{\sin\alpha+\sqrt3\cos\alpha}{2}2sinα+3cosα
sinα−3cosα2\frac{\sin\alpha-\sqrt3\cos\alpha}{2}2sinα−3cosα