Find the bisector of acute angle between the lines `x+y - 3 = 0 and 7x - y + 5 = 0 `

Find measure of an angle between the lines x = 3 and 2x - y - 5 = 0

Find measure of an angle between the lines x + y = 3 and 2x + 5y - 7 = 0.

Find angle between the lines y - sqrt3x - 5 0 " and " sqrt3 y - x +6 = 0 .

Angle between the lines x + y = 0 and y = 5 is ...........

Find the distance between the parallel planes x + y - z + 4 = 0 and x + y - z + 5 = 0 .

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 perpendicular distance between the lines 3x - 4y + 7 = 0 and 6x -8y + 1 = 0.

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

Find the equation of the bisectors of the angle between the lines represented by 3x^2-5xy+y^2=0