2d

• If vectors are co-linear, then they are linearly dependant, can't form basis, and lies on the same line, or parallel to each other
• If vectors are not co-linear, they are linearly independant, can form basis, not lying on the same line nor parallel to each other
• Unit vector is any vector which has a length of one unit.
• The scalar product of two vectors is also known as the dot product or inner product. Scalar product of vectors $v=$$\begin{pmatrix}v_1\\v_2\\v_3\end{pmatrix}, w=$$\begin{pmatrix}w_1\\w_2\\w_3\end{pmatrix}$ is defined as: $v *$$w =$$v_1w_q+$$v_2w_2+$$v_3w_3$ .