If OP = 21 and d.c. 's of `vec(OP)` are `(2/7, 6/7, -3/7)` then P =

If P = (-2, 3, 6) then the d.c.'s of vec(OP) are

If OP=3 and the direction ratios of OP be 4,2 and 4 then find the co-ordinates of p.

If P-=(1,2,3) then direction cosines of OP are

If P(2,3,-6) , Q (3, -4,5) are two points, find the d.c's of vec(OP), vec(QO) and vec(PQ) where O is the origin.

The projection of the line segment joining the origin and the point P (5, 2, 4) on the line whose d.c.'s are (2/7, -3/7, 6/7) is

The projection of the join of the points (3, 4, 2), (5, 1, 8) on the line whose d.c.'s are (2/7, -3/7, 6/7) is

If the d.c.s of the line joining the oints P(4,3,5) and Q(1,1,k) are (3)/(7),(2)/(7),(6)/(7) then k =

Let OP = 21 where O is the origin, if the direction radios of OP are proportional to 6, -2, 3, then the coordinates of P are -

O is origin and P is a point at a distance of 7 units from origin if the direction ratios of OP are lt 3 ,-2, 6 gt , then the coordinates of P are (i) (3,-2,6) (ii) (21,-14,42) (iii) (3/7,-2/7,6/7) (iv) none of these