Define the vector product of two vectors.

(N/A) The vector product (or cross product) of two vectors $\vec{A}$ and $\vec{B}$ is defined as a vector $\vec{C}$ such that $\vec{C} = \vec{A} \times \vec{B} = AB \sin \theta \hat{n}$.
Here,$A$ and $B$ are the magnitudes of vectors $\vec{A}$ and $\vec{B}$ respectively,$\theta$ is the angle between the two vectors $(0^\circ \le \theta \le 180^\circ)$,and $\hat{n}$ is a unit vector perpendicular to the plane containing both $\vec{A}$ and $\vec{B}$.
The direction of $\hat{n}$ is determined by the right-hand rule.