If OP→ is equally inclined to OX→,OY→ and  OZ→and if Pis 3 units from the origin then P which lies in the first octant is

If the length of the line OP=rand direction cosines of  OP¯ are l,m,n then the coordinates of the point Plr,mr,nrSince the line OP→ makes equal angles with coordinate axes, the direction cosines of OP→are 13,13,13Therefore, the coordinates of the point P where OP=3 are P1,1,1  take all positive coordinates because the point P lies in the first octant .