450
300
600
900
The angle between the planes 2x - y + z =6 and x + y + 2z = 7 is
π
2π/3
π/2
π/3
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 direction cosines of any normal to the XY-plane are
(1,0,0)
(0,1,0)
(1,1,0)
(0,0,1)
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
None of these
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
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
-10
10/7
-10/7
-7/10
the angle between the two planes 3x-4y+5z =0 and 2x-y-2z=5 is
π/6
π/4
