$\sin \frac{3\Pi - 5x}{10} = \frac{1}{2}\sin \frac{\Pi - 15x}{10}$.
Edited by tramyvodoi, 02-02-2013 - 14:26.
$\sin \frac{3\Pi-5x}{10}=\frac{1}{2}\sin \frac{\Pi-15x}{10}$
Started By Be Strong, 02-02-2013 - 11:29
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Posted 02-02-2013 - 11:29
Be Strong
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Giải phương trình :
$\sin \frac{3\Pi - 5x}{10} = \frac{1}{2}\sin \frac{\Pi - 15x}{10}$.
$\sin \frac{3\Pi - 5x}{10} = \frac{1}{2}\sin \frac{\Pi - 15x}{10}$.
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