Find the acute angle between two straight lines whose direction number are -4, 3, 5 and 3, 4, 5.

The acute angle between the straight lines whose direction numbers are 1, 1, 2 and (sqrt(3)-1),(-sqrt(3),-1), 4 is -

Find the acute angle between two lines whose direction ratios are and

Find the angles between the line whose direction ratios are 4, -3, 5 and 3, 4, 5 .

Find the acute angle between the two straight lines whose direction cosines are given by 3l+m+5n=0, 6mn-2nl+5lm=0

Find the acute angle between the pair of straight lines whose direction cosines are sqrt(3)/4, -1/4, -sqrt(3)/2 and -sqrt(3)/4, 1/4, -sqrt(3)/2

Find the angle between the lines whose direction ratios are 5, -12, 13 and -3, 4, 5

Find the acute angle vetween two straight lines whose direction cosines are given by the equations l-5m+3n=0 and 7l^(2)+5m^(2)-3n^(2)=0

Find the angle between the lines whose direction ratios are 2, 1, -2 and 3, -4, 5.

Find the acute angle between the pair of straight lines whose direction cosines are sqrt3/4,-1/4,-sqrt3/2 and -sqrt3/4,1/4,-sqrt3/2 .

Find the acute angle between the lines whose direction ratios are : and larr3,-4,1>