If the direction ratios of a stralight line are `(1,2,2),` then find its direction consines.

The direction ratios of a line are 2, 6 and -9. What are its direction cosines ?

Answer the question A line makes angles 30^(@), 60 ^(@) and 90^(@) with positive directions of X,Y and Z-axes, repectively. Find its direction cosines.

If O is the origin, OP = 3 with the direction cosines of OP is - (1)/(3) , (2)/(3), - (2)/(3), then find the coordinates of P .

A line segment AB is internally divided by the point P(1,1) in the ratio 3:1.If the coordinates of A are (-5,4),then find the coordinates of B.

Find the direction ratios of the line joining the points P (1, 3, -2) and Q ( -2 , 4, 0).

A stone is thrown in a vertically upward direction with a velocity of 5 m s^1 . If the acceleration of the stone during its motion is 10m s^-2 in the downward direction, what will be the height attained by the stone and how much time will it take to reach there?

Find the direction cosines of the strating line passing through the point P (7, -5, 10) and Q (8, -3, 8).

What do you mena by centripetal force? What is its direction?

A proton moving with velocity (10^7) m/s to enters a magnetic field of 1.5 T making an angle 30° with the direction of the field. Find the radius of the helical path and its frequency of rotational motion