Mathematics Determinants Evaluation of Determinants

Find the value of k if |A| = k such that \(A = \left[ {\begin{array}{*{20}{c}} {2\cos x}&{ - \;2\sin x}\\ {\sin x}&{\cos x} \end{array}} \right]\) ?

1
2
2
1
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0
4
None of these
5
Question Not Attempted

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