Projection Magnitude

Projection Magnitude

$$|\operatorname{comp}_{\vec b}\vec a|=|\vec a||\cos\theta|$$

Usage

- Used when only the magnitude of the projection is required.

## 146. Scalar Triple Product of Position Vectors

For points with position vectors $$\vec a,\vec b,\vec c$$:

$$\vec a\cdot(\vec b\times\vec c)$$

Usage

- Used to determine the signed volume associated with three position vectors.