1. The problem statement, all variables and given/known data Given a=2i+3j+k, b=i+2j+k, c=-i-j+k, calculate; a)unit vectors b^ and c^ in the directions of b and c respectively. b)the angle between a and c 2. Relevant equations n/a 3. The attempt at a solution I don't understand a) at all, but b is just a simple dot product question. Any ideas for a) ?