created 08/26/97; revised 08/13/00, 10/07/00, 07/25/03, 07/25/09, 01/17/15
The previous chapter discussed some uses of the dot product:
In the first case, the angle between the vector and itself is 0°. In the second case, the angle between the two vectors is 90°.
Does the angle between two vectors have something to do with the dot product?