If α ,β, γ are the angles which a half ray makes with the positive directions of the axes , then sin2α + sin2β + sin2γ =
1
2
-1
0
If A(1,2,3) , B(-1,-1,-1) be the points ,then the distance AB is
√5
√21
√29
None of these
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
The equation of a plane which cuts equal intercepts of unit length on the axes ,is
x+y+z = 0
x+y+z = 1
x+y-z = 0
x/a + y/a + z/a = 1
The direction cosines of x-axis are
(1,0,0,)
(0,0,1)
(0,1,0)
(1,1,1)
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
450
300
600
900
The angle between the two planes 3x-4y+5z =0 and 2x-y-2z=5 is
π/3
π/2
π/6
π/4
00
