The direction cosines of any normal to the XY-plane are
(1,0,0)
(0,1,0)
(1,1,0)
(0,0,1)
The direction cosines of x-axis are
(1,0,0,)
(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
None of these
-13/4
-17/4
4
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
L is parallel to π
L is perpendicular to π
L lies in π
00
300
450
900
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
-10
10/7
-10/7
-7/10
