The sum of all the vectors is then found by drawing a vector from the tail of the first vector in the chain to the head of the last one (Fig. \(\PageIndex{1}\)(c)). The sum vector points from the tail...The sum of all the vectors is then found by drawing a vector from the tail of the first vector in the chain to the head of the last one (Fig. \(\PageIndex{1}\)(c)). The sum vector points from the tail of the first vector to the head of the last. (d) Vector subtraction: \(\mathbf{A}-\mathbf{B}\) points from the head of \(\mathbf{B}\) to the head of A. (e) Multiplication of a vector A by various scalars.