Question

Find the vector c, directed along the internal bisector of the angle between the vectors a = 7i  - 4j − 4k  and  vector b = −2i - j + 2k with |C| = 5√6.

Answer 1

Let vector a = 7i - 4j - 4k and vector b = - 2i - j + 2k.  Then the required vector,