Trigonometry
Write the given trigonometric expression in terms of α\alphaα only.
cos(α−60°)\cos\left(\alpha-60\degree\right)cos(α−60°)
cosα+sinα2\frac{\cos\alpha+\sin\alpha}{2}2cosα+sinα
cosα−sinα2\frac{\cos\alpha-\sin\alpha}{2}2cosα−sinα
cosα+3sinα2\frac{\cos\alpha+\sqrt3\sin\alpha}{2}2cosα+3sinα
cosα−3sinα2\frac{\cos\alpha-\sqrt3\sin\alpha}{2}2cosα−3sinα