Find the angle between the following pairs of lines :
`(i) x+2y-1=0` and `2x-y+3=0`
`(ii) y=5x+1` and `y=-3x+2`

Find the angle between the following pairs of planes. x+3y-5z+1=0 and 2x+y-z+3=0

Find the angle between the following pairs of lines : (i) y=sqrt(3)x+1 and y=(1)/(sqrt(3))x+2 (ii) y=x and y=1-x (iii) 2x+3y=2 and 3x-2y=1 .

Find the angle between the following pairs of lines : (i) y=sqrt(3)x+1 and y=(1)/(sqrt(3))x+2 (ii) y=x and y=1-x (iii) 2x+3y=2 and 3x-2y=1 .

Find the angle between the following pair of the planes.2x+y+2z-4=0and 3x+5y+z-8=0

Find the acute angle between the pairs of lines x+3y+5=0 and 2x+y-1=0