1. The problem statement, all variables and given/known data if A' = BxC/(A.BxC) B' = CxA/(A.BxC) C' = AxB/(A.BxC) prove that A = B'xC'/(A'.B'xC') B = C'xA'/(A'.B'xC') C=(A'xB')/(A'.B'xC') 2. Relevant equations 3. The attempt at a solution I was sort of lost on how to do this. First I tried to simplify a', b', and c' and plug those into a, b, c but that didn't work out. then i took the dot product of A' with A so A'.A = A.(BxC)/(A.BxC) = 1 doing the same for B' and C' makes the answer 1 too. then i did the dot product of A with A' and got 1, and same result for B and C. I'm not sure if that means anything, but now I'm kind of stuck on how to solve this.