None of these
The ratio in which the xy- plane divides the join of (-3,4,-8) and (5,-6,4) is
1:2
2:1
2:3
3:4
The angle between any two diagonals of a cube is
cos-1 2/3
cos-1 1/3
cos-1 1/√3
cos-1 √3/2
For what value of x will the line through (5,1,-2) and (-4,-5,13) be perpendicular to (-5,x,0) and (9,-4,6) ?
2
0
5
3
The equation to the straight line passing through the points (4,-5,-2) and (-1,5,3) is
x-4/1=y+5/-2=z+2/-1
x+4/1=y-5/2=z-3/-1
x/-1=y/5=z/3
x/4=y/-5=z/-2
The value of aa' + bb' + cc' being negative .The origin will lie in the acute angle between the planes are +by+cz+d=0 and a'x + b'y + c'z + d'= 0,if
a = a'= 0
d and d' are of same sign
d and d' are of opposite sign
If α,β,γ be the angles which a line makes with the co-ordinate axes ,then
Sin2α + Cos2β + Sin2 γ=1
Cos2α + Cos2β + Cos2 γ=1
Sin2α + Sin2β + Sin 2γ=1
Cos2α + Cos2β + Sin2 γ=1
The distance from the origin to (2,2,3) is
9
4
√17
√19
If given that the points are A(-11,8,4), B (-1,-7,-1) and c(9,-2,4). Then the lines AB and BC are
Parallel
Perpendicular to each other
Equal
The acute angle between two lines whose direction ratios are 2,3 6 and 1,2,2 respectively is
cos-1(21/20)
cos-1(19/20)
cos-1(21/22)
cos-1(20/21)
