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Question
if `vec"a"= 2hat"i" + 3hat"j"+ hat"k", vec"b" = hat"i" -2hat"j" + hat"k" and vec"c" = -3hat"i" + hat"j" + 2hat"k", "find" [vec"a" vec"b" vec"c"]`
Solution
`[vec" a" vec" b" vec" c"]`
= `|(2,3,1),(1,-2,1),(-3,1,2)|`
= 2 (- 4 - 1) - 3 (2+3) + 1 (1 - 6)
= - 30
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