Current location - Training Enrollment Network - Mathematics courses - Is the mathematical vector difficult?
Is the mathematical vector difficult?
The definition of vector projection is to make a vertical line in the final analysis.

To memorize the formula, you can directly use:

What is the projection of A on B? The modulus of Ab times b.

What is the projection of B in A? The modulus of Ab times a.

The specific proof process is shown in the figure, which does not need memory, but only helps to understand the formula.