\(\overrightarrow{a}=a_{1\bar{i}}+a_{2\bar{j}}+a_{3\bar{k}} = \begin{pmatrix} a_1 \\ a_2\\a_3 \end{pmatrix} \)   Perkalian skalar (Dot Product) \(\overrightarrow{a}.\overrightarrow{b} = |\overrightarrow{a}||\overrightarrow{a}|\cos\alpha\\ \overrightarrow{a}.\overrightarrow{b}=a_1.b_1+a_2.b_2+a_3.b_3\) Perkalian vektor (cross product) \(|\overrightarrow{a}*\overrightarrow{b}|=|\overrightarrow{a}||\overrightarrow{b}|\sin \alpha\) \(\overrightarrow{a}*\overrightarrow{b} = \begin{vmatrix} \overrightarrow{i} &\overrightarrow{j}&\overrightarrow{k}\\ a_1 & a_2 & a_3\\ b_1 & b_2 & b_3\\  \end{vmatrix}\)   Dua vektor yang saling tegak lurus \(\overrightarrow{a} \perp \overrightarrow{b} = \overrightarrow{a}.\overrightarrow{b} = 0 \)