보기

• ⓐ$({\mathbf{u}} \times {\mathbf{v}}) \cdot \mathbf{w} =| \mathbf{u} \times \mathbf{v} | | \mathbf{w} | \cos \theta$ ($\theta$ 는 벡터 $\mathbf{u} \times \mathbf{v}$ 와 $\mathbf{w}$ 의 사잇각)
• ⓑ$\mathbf{u} \cdot (\mathbf{u} \times \mathbf{v}) = \mathbf{v} \cdot (\mathbf{u} \times \mathbf{v}) = 0$
• ⓒ$(\mathbf{u} \times \mathbf{v}) \cdot \mathbf{w} = \mathbf{u} \cdot (\mathbf{v} \times \mathbf{w})$
• ⓓ$| \mathbf{u} - \mathbf{v} |^2 +| \mathbf{u} + \mathbf{v} |^2 =2 | \mathbf{u} |^2 +2 | \mathbf{v} |^2$