यदि \({\rm{\;A}} = \left[ {\begin{array}{*{20}{c}} 0&1\\ { - 1}&0 \end{array}} \right]\) और \({\rm{B}} = \left[ {\begin{array}{*{20}{c}} 1&0\\ 0&1 \end{array}} \right]\), फिर A cos θ – B sin θ के सारणिक का मान क्या है?

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