Angle between the lines joining `(2,0,3)` to `(0,4,2)` and `(0,-1,0)`is

Find the anlge between the line joining the points A(3,-4,-2) and B(12,2,0) and the plane 3x-y+z=1 .

Find the angle between the lines joining the point (0,0),(2,3) and the points (2,-2),(3,5)

The acute angle between the line joining the points (2,1-3) and (-3,1,7) and a line parallel to (x-1)/(3)=(y)/(4)=(z+3)/(5) through the point (-1,0,4) is

Find the angle between the line joining the points (2,0), (0,3) and the line x+y=1.

Find the angle between the line joining the points (2, 0), (0, 3) and the line x+y=1 .

Find the angle between the lines Joining the points (-1,2),(3,-5) and (-2,3),(5,0)

Find the angle between the line joining the points (3,\ -4,\ -2)a n d\ (12 ,\ 2,\ 0) and the plane 3x-y+z=1.

If theta is the angle between the lines joining the points A(0, 0) and B(2, 3), and the points C(2,-2) and D(3,5), show that tan theta=(11)/(23)