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OpenStudy (anonymous):
Find an exact value of sin(19pi.2)
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OpenStudy (anonymous):
\[\sin(\frac{19\pi}{2})=\sin(\frac{16\pi}{2}+\frac{3\pi}{2})=\sin(8\pi+\frac{3\pi}{2})=\sin(\frac{3\pi}{2})\]
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