Question
A (3, 2, 0), B (5, 3, 2) and C (-9, 6, -3) are the vertices of a triangle ABC. The bisector AD of ∆ BAC meets BC at D. Find the co-ordinates of D.
Solution
AD is bisector of
Ratio at D is c : b, where
∴ For point D:
Hence, point D is