User:Aprogressivist/Mathstuff

Reminders:


 * $$\mathbf{a} \times \mathbf{b} = a b \sin \theta \ \mathbf{\hat{n}}$$


 * $$ \mathbf{a} \cdot \mathbf{b} = |\mathbf{a}| \, |\mathbf{b}| \cos \theta \,$$