Find: $\displaystyle S= \frac{sin35.sin65.sin80}{sin20+sin50+sin70}$

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- Feb 26th 2011, 10:11 AMarmQuotient of sum and product of sines.
Find: $\displaystyle S= \frac{sin35.sin65.sin80}{sin20+sin50+sin70}$

- Feb 26th 2011, 01:02 PMmr fantastic