Question:
Find the direction ratios and the direction cosines of the line segment joining the points:
(i) $A(1,0,0)$ and $B(0,1,1)$
(ii) $A(5,6,-3)$ and $B(1,-6,3)$
(iii) $A(-5,7,-9)$ and $B(-3,4,-6)$
Solution:
