Find the equation of the planes bisecting the angles between planes `2x+y+2z=9 and 3x-4y+12z+13=0`

Find the equations of the plane bisecting the angles between the planes x+22y+2z-3=0, 3x+4y+12z=1=0 and specify the plane which bisects the acute angle between them.

Find the equation of the bisector planes of the angles between the planes 2x-y+2z-19=0 and 4x-3y+12z+3=0 and specify the plane which bisects the acute angle and the planes which bisects the obtuse angle.

Find the equations of the bisectors of the angles between the planes 2x-y+2z+3=0a n d3x-2y+6z+8=0 and specify the plane which bisects the acute angle and the plane which bisects the obtuse angle.

Find the equations of the bisectors of the angles between the planes 2x-y+2z+3=0a n d3x-2y+6z+8=0 and specify the plane which bisects the acute angle and the plane which bisects the obtuse angle.

Find the angle between the plane: 2x+y-2z=5 and 3x-6y-2z=7

Find the angle between the planes x-y+2z=9 and 2x+y+z=7 .

Find the angle between the planes -x+y+2z=9 and x+2y+z=5

Find the angle between two planes 2x+y-5z=0 and 4x -3y+7z=0

Find the angle between the plane: 2x-y+z=6 and x+y+2z=7

Find the angle between the planes x+y+2z=9a d n2x-y+z=15.