Find a unit vector in the direction of AB , where A (1, 2, 3) and B (4, 5, 6) are the given points ?
The trick is using formula we get 1 3 ; i + 1 3 ; j + 1 3 ; k. Calculation gives this directly, check steps: apply rule, substitute values, simplify to get 1 3 ; i + 1
Ref: NCERT Mathematics Class XII — Vectors and 3D Geometry
