A point on XOZ-plane divides the join of (5,-3,-2) and (1,2,-2) at
(5,0,2)
(5,0,-2)
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
If a line makes angles ,β,Υ and with four diagonals of a cube, then the value of is
1
A line AB in three-dimensional space makes angles 45o and 120o with the positive x-axis and the positive y-axis respectively. If AB makes an acute angle θ with the positive z-axis, then θ equals
300
450
600
750
If projection of a line on x, y and z-axes are 6,2 and 3 respectively, then direction cosines of the line is
None of these
The direction cosines of the line which is perpendicular to the lines whose direction cosines are proportional to (1,-1,2) and (2,1,-1) are
What are the DR's of vector parallel to ( 2 , -1 , 1) and ( 3, 4 , -1 ) ?
(1,5,-2)
(-2,-5,2)
(-1,5,2)
(-1,-5,-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
3 : 2
2 : 3
1 : 3
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
