In a triangle \( A B C, \angle B=90^{\circ} \). If \( A B=12 \mathrm{~cm} \) and \( A C=13 \math...

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In a triangle \( A B C, \angle B=90^{\circ} \). If \( A B=12 \mathrm{~cm} \) and \( A C=13 \mathrm{~cm} \), then find \( \sin A \) and \( \cos C \).
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