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 direction cosines of the normal to the plane is (3x-6y+2z=7 .

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/

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 reflection of the point (2,-1,3) in the plane 3x-2y-z=9 is (A) (28/7,15/7,17/7) (B) (26/7,-15/7,17/7) (C) (15/7,26/,-17/7) (D) (26/7,17/7,-15/70)

The distasnce of the plane 2x-3y+6z+14=0 from the origin is (A) 2 (B) 4 (C) 7 (D) 11

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)

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

The angle between the planes 2x-y+3z=6 and x+y+2z=7 is

If A-2B=[(1,5),(3,7)] and 2A-3B=[(-2,5),(0,7)] the matrix B= (A) [(-4,-5),(-6,-6)] (B) [(0,6),(-3,7)] (C) [(2,-1),(3,2)] (D) none of these

Find the directions ratios of the line perpendicular to the lines (x-7)/(2) = ( y+ 7)/(-3) =(z-6)/(1) and (x+5)/(1) = (y+3)/(2)= (z-6)/(-2)