The direction cosines of two lines satisfy the relations `lamda(l+m)=n` and `mn+nl+lm=0`. The value of `lamda`, for which the two lines are perpendicular to each other, is -

The direction cosines of a line satisfy the relations lambda(l+m)=n and m n+n l+l m=0. The value of lambda, for which the two lines are perpendicular to each other, is

The direction cosines of a line satisfy the relations lambda(l+m)=n and mn+nl+lm=0. The value of lambda, for which the two lines are perpendicular to each other,is a.1 b.2 c.1/2 d.none of these

The direction cosines of a line satisfy the relations lambda(l+m)=na n dm n+n l+l m=0. The value of lambda, for which the two lines are perpendicular to each other, is a. 1 b. 2 c. 1//2 d. none of these

The direction cosines of a line satisfy the relations lamda(l+m)=nandmn+nl+lm=0 . The value of lamda for which the two lines are perpendicular to each other, is

The direction cosines of line satisfy the relations lambda(l+m) = n and lm + mn + ln = 0. The value of lambda for which the two lines are perpendicualr to each other is ..........

The direction cosines of two lines satisfy 2l+2m-n=0 and lm+mn+nl=0 . The angle between these lines is

The direction cosines of two lines satisfy 2l+2m-n=0 and lm+mn+nl=0 . The angle between these lines is