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Matrices — Mathematics STD 10 — Question

ICSE BoardEnglish MediumSTD 10MathematicsMatrices3 Marks
Question
Simplify : $\sin A\left[\begin{array}{cc}\sin A- & \cos A \\ \cos A & \sin A\end{array}\right]+\cos A\left[\begin{array}{cc}\cos A & \sin A \\ -\sin A & \cos A\end{array}\right]$
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