If the direction ratios of a line are 1,-3,2 ;then its direction cosines are
1/√14 , -3/√14 ,2/√14
1/√14 , 2/√14 , 3/√14
-1/√14 , 3/√14 , -2/√14
-1/√14 , -2/√14 , -3/√14
00
300
450
900
A point (x.y.z) moves parallel to XY plane Which of three variables x,y,z remain fixed
z
x
y
x and y
Parallel
Coincident
Skew
Perpendicular
The angle between the two planes 3x-4y+5z =0 and 2x-y-2z=5 is
π/3
π/2
π/6
π/4
The point which divides the line joining the points (2,4,5) and (3,5,-4) in the ratio -2:3 lies on
ZOX-plane
XOY-plane
YOZ-plane
None of these
The direction cosines of any normal to the XY-plane are
(1,0,0)
(0,1,0)
(1,1,0)
(0,0,1)
L is parallel to π
L is perpendicular to π
L lies in π
-10
10/7
-10/7
-7/10
