None of these
The direction cosines of x-axis are
(1,0,0,)
(0,0,1)
(0,1,0)
(1,1,1)
00
300
450
900
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
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 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
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
L is parallel to π
L is perpendicular to π
L lies in π
The direction cosines of any normal to the XY-plane are
(1,0,0)
(1,1,0)
The direction ratios of the line x-y+z-5=0 and x-3y-6=0 are
3,1,-2
2,-4,1
3/√14, 1/√14 ,-2/√14
2/√41 , -4/√41 , 1/√41
