MathematicsMedium249×since 2002Q2374The angle between the lines whose direction cosines satisfy the equations l+m+n=0l+m+n=0l+m+n=0 and l2=m2+n2{l^2} = {m^2} + {n^2}l2=m2+n2 is :Aπ6{\pi \over 6}6πBπ2{\pi \over 2}2πCπ3{\pi \over 3}3πDπ4{\pi \over 4}4πCheck answerSkip