Precalculus (6th Edition) Blitzer

The given statement shows that there are two ways of writing the double angles in any trigonometric function that is as given below: $\sin \,2\alpha =2\,\sin \alpha$ That statement is not true because the numbers "2" in the double angle formula do not get pulled to the front and written as the coefficient as they do not coincide with each other and are not equal to each other.