- #1
webz
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Homework Statement
Cross vector A with vector B.
A = <0,3,4> B = <4,-4,7>
Homework Equations
a x b = (a2b3 - a3b2) i + (a3b1 - a1b3) j + (a1b2 - a2b1) k
(I think)
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'?