Find the distance between each of the following pairs of points :
(x-y,y-x),(x+y,x+y).

Find the angles between each of the following pairs of lines: (x-2)/3=(y+1)/-2,z=2 , (x-1)/1=(y+3)/3=(z+5)/2 .

Find the distance between the line and the point of the following : x+y=0, (0,0) .

Find the distance between the line and the point of the following : 12x-5y-7=0, (3,-1) .

Find the distance between the line and the point of the following : 3x+4y-5=0, (-3,4) .

Find the distance between the line and the point of the following : 12(x+6)=5 (y-2),(-1,1) .

Find the distance between the line and the point of the following : 3x-4y-26=0(3,-5) .

Find the value of x,y and z in each of following.

Find the value of x,y and z in each of following.

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

Find the derivative of y w.r.t x in each of the following: x-y = pi