1. The problem statement, all variables and given/known data The question asks to calculate (AxB)·C, where A's magnitude is 5.00, B's magnitude is 4.00, and they are both in the xy-plane. B is 37° counter clockwise from A. C has a magnitude of 6.00 and is in the +z-direction. 2. Relevant equations (A×B) = ABsinθ = D; D·C = DCcosσ = R 3. The attempt at a solution (A×B) = 5×4×sin37° = 12.363 = D. D·C = 12.363×6.00×sin90° = 72.2 = R which is the correct answer. But doesn't the dot in (A×B)·C imply a scalar product in which case the last part should be 12.363×6.00×cos90°?