for the vectors a=i+4j-2k and b=2i-j+3k find : axb
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Originally Posted by bobmarly12345 for the vectors a=i+4j-2k and b=2i-j+3k find : axb Evaluate this determinate expanding along the first row: $\displaystyle \left| {\begin{array}{rrr} i&j&k \\ 1&4&{ - 2} \\ 2&{ - 1}&3 \end{array}} \right|=?$
I assume a x b is the cross product. Try the method described in Wikipedia.
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