The angle between the lines whose direction ratios are proportional to 1, -2, 1 and 4, 3, 2 is -

Write the angle between the lines whose direction ratios are proportional to 1, -2, 1 and 4, 3, 2.

The angle between the lines whose direction cosines are proportional to (1,2,1) and (2,-3,6) is

Find the angle between the vectors with direction ratios proportional to 1,-2,1 and 4,3, 2.

Find the acute angle between the lines whose direction ratios are proportional to 2:3:6 and 1:2: 2.

Find the angle between the vectors with direction ratios proportional to 1,-2,1 and 4,3,2.

Find the angel between the vectors with direction ratios proportional to 1, -2, 1 and 4, 3, 2.

Find the angel between the vectors with direction ratios proportional to 1, -2, 1 and 4, 3, 2.

Find the acute angle between the lines whose direction ratios are proportional to 2:3:6 and 1:2:2.

The acute angle between the lines whose direction cosines are proportional to 3,-1,2 and 2,1,-3 is

Find the angle between two lines whose direction ratios are proportional to 1,1,2 and (sqrt(3)-1),(-sqrt(3)-1),4