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## Main Question or Discussion Point

Does anyone know where I can find the derivation of the cross product. I know how to use it and the like but I do not understand why the norm of the matrix :

[tex]

\left[ \begin{array}{ccc}i & j & k \\n1 & n2 & n3 \\m1 & m2 & m3 \\\end{array}\right] [/tex]

yields the vector perpendicular to 'n' and 'm'.

[tex]

\left[ \begin{array}{ccc}i & j & k \\n1 & n2 & n3 \\m1 & m2 & m3 \\\end{array}\right] [/tex]

yields the vector perpendicular to 'n' and 'm'.