The projections of a vector on the three coordinate axis are 6, `3` , 2 respectively. The direction cosines of the vector are (1) `6,-3,2` (2) `6/5,(-3)/5,2/5` (3) `6/7,(-3)/7,2/7` (4) `(-6)/7,(-3)/7,2/7`

The projections of a vector on the three coordinate axis are 6,3,2 respectively.The direction cosines of the vector are (A)6,-3,2(B)(6)/(5),(-3)/(5),(2)/(5)(C)(6)/(7),(6)/(7),(2)/(7) (D) (-6)/(7),(-3)/(7),(2)/(7)

If projections of as line on x,y and z axes are 6,2 and 3 respectively, then directions cosines of the lines are (A) (6/2,2/7,3/7) (B) (3/5,5/7,6/7) (C) (1/7,2/7,3/7) (D) none of these

The direction cosines of the ray from (0,0,0) to (2,-3,6) are (A) -2/7,3/7,-6/7 (B) 2/7,37,6/7 (C) -2/7,-3/7,6/7 (D) 2/7,-3/7,6/

The direction cosines of a normal to the plane 2x-3y-6z+14=0 are (A) (2/7,(-3)/7,(-6)/7) (B) ((-2)/7,3/7,6/7) (C) ((-2)/7,(-3)/3,(-6)/7) (D) none of these

Find the angle between the two lines whose direction cosines are: (2)/(3),(-1)/(3),(-2)/(3) and (3)/(7),(2)/(7),(6)/(7) .

(5)/(4)-(7)/(6)-(-(2)/(3))

If the coordinates of one end of a diameter of a circle are (2,3) and the coordinates of its centre are (-2,5), then the coordinates of the other end of the diameter are (-6,7) (b) (6,-7)( c) (6,7)(d)(-6,-7)

Find the area of the pentagon whose vertices are (4, 3), (-5, 6), (0, -7), (3, -6), (-7, -2)

1(2)/(6)+3(2)/(6)+7(5)/(6)

Find the the projection of the line segment joining the points : (I) (2,-3,0) (0,4,5) on the line with direction cosines lt (2)/(7) , (3)/(7), (-6)/(7) gt (ii) (1,2,3), (4,3,1) on the line with direction-ratios lt 3, -6, 2 gt .