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[" 12."A=[[1,2,2],[2,1,2],[2,2,1]]" .Sco...

[" 12."A=[[1,2,2],[2,1,2],[2,2,1]]" .Scoler matik "]

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Show that , A =1/3[[-1,2,-2],[-2,1,2],[2,2,1]] is proper orthogonal matrix .

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