find the cross product a x b of the vectors a = 5.0m,i and b=4.3m,k(adsbygoogle = window.adsbygoogle || []).push({});

[tex]5.0m\ast 4.3m\ast \sin (90)=22m^2,\hat {j}[/tex]

The back of the book gives

[tex]-(22m^2)\hat {j}[/tex]

Where does the minus sign come from?

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# Homework Help: Cross product

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