Two marks example problem I — task. Mathematics State Board, Class 10.

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Find the order of the following matrices.

(i)

(\begin{array}{l} \sin θ & - \cos θ \\ \cos θ & \sin θ \end{array})

\(=\)

i \times i

(ii)

(\begin{array}{l} 1 & 3 \\ \sqrt{2} & 5 \\ \frac{1}{2} & - 4 \end{array})

\(=\)

i \times i

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4. Two marks example problem I