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

Find the equation-of the bisector of the obtused angle between the straight lines x-2y+4=0 and 4x-3y+2=0.

Find the angle between the straight lines : 2x-y=9andx-3y+8=0

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

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

Find the bisector of the obtuse angle between the lines 12x+5y-4=0 and 3x+4y+7=0

Find the acute angle between the pairs of lines x+3y+5=0 and 2x+y-1=0

Find the obtuse angle between the lines x-y+2=0 and (2-sqrt(3))x-y+1=0 .

Find the equation of bisector of the obtuse angle between the lines x+y-5=0 and x-7y+7=0

The bisector of acute angle between the straight lines 4x+3y-6=0 and 5x+12y+9=0 is