Find the angle between the planes `2x-y+z=6` and `x+y+2z=7`

Find the acute angle between the planes 2x-3y+5z=1 and x-y-z=7 .

Find the angle between the planes 2x – 3y + 4z= 1 and - x + y = 4

Find the angle between the two planes 3x - 6y + 2z =7 and 2x + 2y – 2z = 5.

The angle between the planes 2x + y - z = 9 and x + 2y + z = 7 is …………

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 lines x-3y-4=0,4y-z+5=0a n dx+3y-11=0,2y=z+6=0.

Find the angle between the lines x-3y-4=0,4y-z+5=0a n dx+3y-11=0,2y=z+6=0.

Find the angle between the line (x+1)/2=y/3 =(z-3)/6 and the plane 10x+2y-11z=3.

Find the distance between the parallel planes x-2y-2z=3 and 2x-4y-4z=7 .