The acute angle between the two lines whose direction ratios are given by `l+m-n=0 " and " l^(2)+m^(2)-n^(2)=0` is

Find the acute angle between the two straight lines whose direction cosines are given by l+m+n=0 and l^(2)+m^(2)-n^(2)=0

Find the acute angle between the two straight lines whose direction cosines are given by l+m+n=0, l^(2)+m^(2)-n^(2)=0

Find the angle between the line whose direction cosines are given by l+m+n=0 and 2l^(2)+2m^(2)-n^(2)-0

The angle between the lines whose direction cosines are given by 3l+4m+5n=0 , l^(2)+m^(2)-n^(2)=0 is

The acute angle between the two lines whose d.cs are given by l+m-n=0 and l^(2)+m^(2)-n^(2)=0 is

Find the acute angle between the two straight lines whose direction cosines are given by l+m+n=0 and l^2+m^2-n^2=0

Find the acute angle between the two straight lines whose direction cosines are given by l+m+n=0 and l^2+m^2-n^2=0

Prove that the acute angle between the lines whose direction cosines are given by the relation l+ m+n=0 and l^2+m^2-n^2=0 and pi/3