Find the acute angle between the following lines.
`2x=3y=-zand6x=-y=-4z`

Find the acute angle between the following lines. (x+4)/(3)=(y-7)/(4)=(z+5)/(5),vec(r)=4hat(k)+t(2hat(i)+hat(j)+hat(k))

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

Find the angle between the following lines (x-1)/(2)=(y+1)/(3)=(z-4)/(6) and x+1= (y+2)/(2)=(z-4)/(2) .

Find the acute angle between the straight lines (x-4)/(2)=(y)/(1)=(z+1)/(-2) and (x-1)/(4)=(y+1)/(-4)=(z-2)/(2) state whether they are parallel or perpendicular.

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

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 planes 2x – 3y + 4z= 1 and - x + y = 4