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

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

Find the angles between the lines whose direction ratios are 3,2,-6 and 1,2,2.

(i) Find the angle bewteen the lines whose direction ratios are 1, 2, 3 and - 3 , 2 , 1 (ii) Find the angle between two diagonals of a cube.

Find the angle between the lines whose direction ratios are a,b,c and b-c,c-a,a-b

Find the angle between the lines whose direction ratios are a,b,c and b-c,c-a,a-b .

31.If the angle between the lines whose direction ratios are 2,-1,2 and a,3,5 be 45^(@) , then a=(A)1(B)2(C)3(D)4

The acute angle between the lines whose direction ratios are 1, 2, 2 and -3, 6, -2 is

Find the measure of a acute angle between the line direction ratios are 5, 12, -13 and 3, -4, 5.

The acute angle between the lines whose direction ratios are 3, 2, 6 and -2, 1, 2 is