[" Find the obtuse angle between the straight lines "9x+3y-4=0" and "],[2x+4y+5=0]

Find the angle between the straight lines : 2x-y=9andx-3y+8=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 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 obtuse angle between the lines x-y+2=0 and (2-sqrt(3))x-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 angle between the pairs of lines x+3y+5=0 and 2x+y-1=0

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