If the direction ratios of two lines are (1,2,4) and (-1,-2,-3) then the acute angle between them is

If the direction ratios of two lines are (5,-12,13) and (-3,4,5) then the angle between them is

If direction ratios of two lines are 5,-12,13 and -3,4,5 , then the angle between them is

The directions rations of two lines are 3,2,-6 and , 1,2,2 respectively . The acute angle between these lines is

If the direction ratios of two lines are 2, -3, 6 and 1, -2, 2 respectively then the angle between the lines is -

The diection ratios of two lines are proportional to (2,3,-6) and (3,-4,5), then the acute angle between them is

If the d.R.s of two lines are 1,-2,-2 and 2,-2,1 , then the measures of the acute angle between them is

If direction-cosines of two lines are proportional to 4,3,2 and 1, -2, 1, then the angle between the lines is :

If the direction cosines of two lines are proportional to 2,3,-6 and 3 ,-4,5, then the acute angle between then

The slopes of two lines are (1)/(2) and 3 . Find the angle between them.

The slopes of two lines are (1)/(2) and 3 . Find the angle between them.