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

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

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

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

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

Find the angle between the straight lines : 2x+3y-6=0and3x-2y+11=0

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