Using Laplace theorem, find the determinant of the following matrix. (7 marks) 3 5 2 4 1 3 7 6 A 2 4 8 3 5 6 9 7 b. i. Show that the following matrix is orthogonal. (6 marks) A 1770 √2 0

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A: ANS : ( a ) ​STEP 1 ​​  STEP 2 ​​   ANS : ( b ) ​ STEP 1 ​​STEP 2 ​​  ANS : ( c ) ​ STEP 1 ​​ STEP 2…

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