Question

If a➡️ <a1,a2,a3>, b➡️ <b1,b2,b3> are two vectors in space

         Write down the formula of the cross product of these vectors and show all calculation.

Answer 1

$$\vec{a}\cdot\vec{b}=\langle a_1,a_2,a_3\rangle\cdot\langle b_1,b_2,b_3\rangle$$

$$=a_1b_1+a_2b_2+a_3b_3$$