1. The problem statement, all variables and given/known data Cross vector A with vector B. A = <0,3,4> B = <4,-4,7> 2. Relevant equations a x b = (a2b3 - a3b2) i + (a3b1 - a1b3) j + (a1b2 - a2b1) k (I think) 3. The attempt at a solution AxB= i(21-16)-j(16-0)+k(0-12) = <5,-16,12> I'm unsure if the component 'j' is correct. First, my teacher negated the value in their formula (i-j+k), and then he cross multiplied backwards (instead of (a1b3-a3b1) he used (a3b1-a1b3)). I have done this in the above problem to mimic what he did, however, I don't know if it is correct. Can someone help to clarify component 'j'?