Find the obtuse angle between the straight lines `9x+3y-4=0 and 2x+4y+5=0`.

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

The equations of the bisectors of the angles between the straight line 3x-4y+7=0 and 12x-5y-8=0 , are:

Find the acute angles between the st. Lines : y-3x-5=0 and 3y-x+6=0

The equation of the line which bisects the obtuse angle between the line x-2y+4=0 and 4x-3y+2=0 is

The equation of the line which bisects the obtuse angle between the lines x - 2y + 4 = 0 and 4x - 3y + 2 = 0, is