Find the angle between the lines `x-2y+3=0 and 3x+y-1=0`.

Find the obtuse angle between the lines x-2y+3=0\ a n d\ 3x+y-1=0.

Find the angle between the lines 3x=5 and 3x+5y-2=0 .

Find the angle between the lines x+3y-8=0 and 2x-3y+6=0 .

The angle between the lines 2x- y +3=0 and x+ 2y +3=0 is

If the point (a^2,a+1) lies in the angle between the lines 3x-y+1=0 and x+2y-5=0 containing the origin, then find the value of adot

If the point (a^2,a+1) lies in the angle between the lines 3x-y+1=0 and x+2y-5=0 containing the origin, then find the value of adot

Find the acute angle between the lines 2x-y+3=0\ a n d\ x+y+2=0.

Find the angle between the planes 2x+y+z-1=0 and 3x+y+2z-2=0 ,

Find the equations of the lines bisecting the angles between the lines 4x-3y+12=0 and 12x+5y=20 .

Find the equation of the bisector of the acute angle between the lines 3x-4y+7=0 and 12x+5y-2=0 .