Direction cosines of normal to the plane containing lines `x=y=z` and `x-1=y-1=(z-1)/(-1)` (where `d in R-{1}` ,are

Direction cosines to the normal to the plane containing the lines (x)/(2)=(y)/(3)=(z)/(5) and (x-1)/(2)=(y-1)/(3)=(z-1)/(5) are

The directions cosines of the normal to the plane 2x-y +2z =3 are

The equation of the plane containing the two lines (x-1)/2=(y+1)/(-1)=z/3 and x/(-1)=(y-2)/3=(z+1)/(-1) is

The direction cosines of a line parallel to the line (x+1)/(2)=(y)/(-3)=(z-5)/(6) are

What is the cosines of angle between the planes x+y+z+1=0 and 2x-2y+2z+1=0 ?

What is the cosine of angle between the planes x+y+z+1=0 and 2x-2y+2z+1=0 ?

Equation of plane containing the two lines (x-1)/2 = (y+1)/-1 = z/3 and x/2 = (y-2)/-1 = (z+1)/3 is