Answer
$\alpha=60^{\circ}$
$\beta=30^{\circ}$
Work Step by Step
$\cos\alpha=\frac{5}{10}$
$\alpha=\cos^{-1}\frac{5}{10}$
$\alpha=60$
$\sin\beta=\frac{5}{10}$
$\beta=\sin^{-1}\frac{5}{10}$
$\beta=30$
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