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AnishGC:
Write the Formula of SinC + SinD = ? And Sin3theta = ?
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KyledaGreat:
\[SinC + Sin D = 2\sin \frac{ C+D }{ 2 } \cos \frac{ C-D }{ 2}\] \[Sin 30 = 3\sin \theta - 4\sin^{3}\theta \]
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