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Evaluate the determinants (i) {:[( cos ...

Evaluate the determinants ` (i) {:[( cos theta , -sin theta ),( sin theta , cos theta ) ]:}" " (ii) {:[( x^(2) -x+1,x-1),( x+1,x+1) ]:}`

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The correct Answer is:
` 1`
` x^(3) , -x^(2) +2`
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