Find the angle between the lines
`(5-x)/(3)=(y+3)/(-4) ,z=7 " and " (x)/(1) =(1-y)/(2)=(z-6)/(2)`

Find the angle between the pair of lines (x+3)/(3)=(y-1)/(5)=(z+3)/(4) and (x+1)/(1)=(y-4)/(1)=(z-5)/(2)

Find the angle between the lines (x-7)/(2)=(y-6)/(3)=(z+2)/(-4) and (2-x)/(-1)=(y-9)/(5)=(z-12)/(4) .

Find the angle between the following pairs of lines : (5-x)/3=(y+3)/-4, z=7 and x=(1-y)/2=(z-6)/2

Find the angle between the lines (x+3)/(3)=(y+1)/(5)=(z+3)/(4)and(x+1)/(1)=(y-4)/(1)=(z-5)/(2) .

Find the angle between the following lines (x-5)/(1)=(2y+6)/(-2)=(z-3)/(1) and (x-2)/(3)=(1+y)/(4)=(z-6)/(5)