Find the angle between the lines whose direction cosines are connected by the relations `l+m+n=0a n d2lm+2n l-m n=0.`

Find the angle between the lines whose direction cosines are given by the equations 3l+m+5n=0 and 6mn-2nl+5lm=0

Find the angle between the lines whose direction cosines are given by the equations 3l+m+5n=0,6mm-2nl+5l=0

The angle between the lines whose direction cosines are given by the equatios l^2+m^2-n^2=0, m+n+l=0 is

If (theta) is an angle between two lines whose direction cosines are connected by the relations l-5m+3n=0 and 7l^(2)+5m^(2)-3n^(2)=0 then 12cos^(2)theta =

Find the angle between the lines whose direction cosines has the relation l+m+n=0 and 2l^(2)+2m^(2)-n^(2)=0 .

Find the angle between the lines whose direction cosine are given by the equation: "l"-"m"+"n"=0" and l"^2-"m"^2-"n"^2=0