If A is an orthogonal matrix of order 3 and B=[\table1,2,3;-3,0,2;2,5,0] ,then which of the following is/are correct ? 1. |AB|=\pm47 2. AB=BA Select the correct answer using code giving below : [NDA II 2015]

Correct Answer is : Both 1 and 2

UPSC NDA II 2015 Mathematics Solved Paper

Question : 25 of 120

Marks: +1, -0

If A is an orthogonal matrix of order 3 and B=[

] ,then which of the following is/are correct ?
1. |AB|=±47
2. AB=BA
Select the correct answer using code giving below :

[NDA II 2015]

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