Posted by **manjula** on Wednesday, January 16, 2013 at 4:57pm.

if (l1,m1,n1),(l2,m2,n2),(l3,m3,n3) are the direction cosines of three mutual perpendicular lines,show that the line whose direction ratios area l1+l2+l3,m1+m2+m3,n1+n2+n3 make equal angles with them

## Answer this Question

## Related Questions

- analytical geometry - if (l1,m1,n1),(l2,m2,n2),(l3,m3,n3) are the direction ...
- 3 D - geometry (direction of cosines) - Find the angle between the lines between...
- geometry - A grid has lines at 90-degree angles. There are 12 lines in one ...
- geometry - Martin drew a pair of perpendicular lines and a pair of parallel ...
- Math - a grid has line at 90-degree angles. There are 12 lines in one direction ...
- Geometry - Which of the following statements from Euclidean geometry is also ...
- 4th grade - Geometry, Isoseles right triangle. Line segments MN and NO are...
- Geometry - Which statement from Euclidean geometry is also true in spherical ...
- maths geometry - Find and write down a proof that the product of the gradients ...
- Algebra - Which of the following statements from Euclidean geometry is also true...