The angle between the two planes 3x-4y+5z = 0 and 2x-y-2z = 5 is
π/3
π/2
π/6
π/4
None of these
If a line makes the angles α, β and γ with the axes respectivley, then cos 2α + cos 2β + cos2 γ =
-2
-1
1
1/2
Skew lines are :
Perpendicular lines
Parallel lines
Co planes lines
Non - Co planar lines
Education of aplane parallel to x - axis is ______.
ax + by + cz + d = 0
by + cz + d = 0
ax + by + d = 0
ax + cz + d = 0
The equation of the sphere concentric with and which phases through the point ( 0, 1, 0 ) is
x2 + y2 - z2 + 4x + 6y - 8z -7 = 0
x2 + y2 +z 2 + 4x - 6y - 8z = 0
x2 +y2 + z2 -4x - 6y - 8z + 5 = 0
x2 + y2 + z2 - 4z + 6y - 8z - 7 = 0.
The distance of the point ( 2, 3, - 5 ) from the plane x + 2y - 2z = 9 is
4
3
2
The direction cosines of a line equally inclined with coordinate axes are :
( 1, 1, 1 )
( 1, 0, 0 )
( 0, 1, 0)
The locus of a first degree equation in x, y, z is
Straight line
Plane
Sphere
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
