(i) Position vector of origin O(0,0,0) is \(\vec{a} = \vec{0}\) and position vector equation of (5, – 2, 3) is
∴ Vector equation of line passing through \(\vec{a} \) and \(\vec{b}\)
(ii) Line passing through origin O(0, 0, 0) whose dc’s are 5,-2, 3.
∴ Cartesian equation of line is
