1. The problem statement, all variables and given/known data If u is a unit vector, find u.v and u.w 2. Relevant equations I assumed that unit vector means u=<1,1,1> u.v=|u||v|cos60 My knowledge of unit vectors is very limited. I know that a unit vector is i=<1,0,0> j=<0,1,0> k=<0,0,1> 3. The attempt at a solution Since the triangle is isoceles. |u|=|v| u.v=(sqrt(3)+sqrt(3) )cos60=-3.29925 Is this correct?