Given lines are
2x = 3y = - z and 6x = - y = - 4z which may be written as
Parallel vectors \(\vec{b_1}\) and \(\vec{b_2}\) of (i) and (ii) respectively are
\(\therefore\) Angle between lines (i) and (ii) = Angle between \(\vec{b_1}\) and \(\vec{b_2}\)
