If \( \cos \alpha=\frac{12}{13} \) and \( \sin \beta=\frac{4}{5} \)...

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If \( \cos \alpha=\frac{12}{13} \) and \( \sin \beta=\frac{4}{5} \), then find \( \sin (\alpha+\beta) \).
\( \because \)
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