If the direction cosines of a line are, then
0 < c< 1
c > 2
If the direction cosines of two lines are such that l + m + n = 0, l2 + m2-n2 = 0, then the angle between them is
/3
/4
/6
The ratio in which yz-plane divides the line segment joining (-3,4,-2) and (2,1,3) is
-4 : 1
3 : 2
-2 : 3
1 : 4
The perimeter of the triangle with vertices at (1,0,0), (0,1,0) and (0,0,1) is
3
2
If P (x,y,z) is a point on the line segment joining Q (2,2,4) and R (3,5,6) such that the projections of OP on the axes are
respectively, then P divides QR in the ratio
1 : 2
2 : 3
1 : 3
The xy - plane divides the line joining the points (-1,3,4) and (2,-5,6)
internally in the ratio 2 : 3
externally in the ratio 2 : 3
internally in the ratio 3 : 2
externally in the ratio 3 : 2
A line makes an obstuse angle with the positive x-axis and angle with the positive y and z-axes respectively.
Its direction cosine are
Let A(1,-1,2) and B (2,3,-1) be two points. If a point P divides AB internally in the ratio 2 : 3, then the position vector of P is
If a line in the space makes angle with the coordinate axes, then
equals
-1
0
1
The distance between the points (1,4,5) and (2,2,3 ) is
5
4
