Answer to Question #314301 in Physics for enen

Question #314301

If a= (2,1,-1), b=(1,-1,1) then a × b is

Expert's answer

The cross product of vectors is given by

"\\vec a\\times \\vec b=\\begin{vmatrix}\n \\hat i & \\hat j & \\hat k\\\\\n 2 & 1& -1\\\\\n1&-1&1\n\\end{vmatrix}\\\\\n= 0\\hat i -3 \\hat j-3\\hat k=(0,-3,-3)"

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