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How do you know if $sin 30 = sin 150$ $sin 30 = sin 150$ ?

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Feb 13, 2015

$30^{o}$ $30^o$ and $150^{o}$ $150^o$ are reflections of each other in the Y-axis.
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So ${sin 30}^{o} = {sin 150}^{o}$ $sin 30^o = sin 150^o$

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