The direction cosines of x-axis are :
(1,0,0,)
(0,0,1)
(0,1,0)
(1,1,1)
None of these
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 equation of the plane through the origin and parallel to the plane. 3x - 4y + 5z - 6 = 0 is.
3x - 4y + 5z + 6 = 0
3x + 4y - 5z + 6 = 0
3x - 4y - 5z - 6 =0
3x - 4y + 5z = 0.
00
300
450
900
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
Skew lines are :
Perpendicular lines
Parallel lines
Co planes lines
Non - Co planar lines
If a line makes the angles α, β and γ with the axes respectivley, then cos 2α + cos 2β + cos2 γ =
-2
1/2
If A(1,2,3) , B(-1,-1,-1) be the points ,then the distance AB is
√5
√21
√29
The angle between the planes 2x - y + z = 6 and x + y + 2z = 7 is
π
2π/3
π/2
π/3
