find the direction cosine of joining vector `(1,1,-1),(2,3,1)`

Find the direction cosines of the line joining the points (1,1,-3) and (-2,-3,2)

Find the direction cosines of the line joining the points (1,-1,0) and (2, 1, 3).

Find the direction cosines of the line segment joining (1,-1,2) and (2,1,1).

Find the direction cosines of the line joining (-1,-2,-3) and (3,4,5) .

Find the, direction cosines of the vector joining 'A(1,2,-3)' and 'B(-1,-2,1)', directed from 'A' fò 'B'.

Find the direction cosines of the line joining the points (-4,1,7),(2,-3,2)