The dot product and projections
The projection of one non-zero vector onto another non-zero is like casting a shadow of one vector onto another. In this interactive figure, you will explore how the projection is related to the dot product of two vectors.
You can drag points A and B. Notice that when you hover over a point, arrows appear showing you how the point will move. Click on the point without dragging to change how the point moves.
Developed for use with Thomas' Calculus, published by Pearson.