simplify the following. sin(7π/12) + cos(-π/12) final answer must be EXACT please show all work. Thanks
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Originally Posted by meli3000 simplify the following. sin(7π/12) + cos(-π/12) final answer must be EXACT please show all work. Thanks Here is a hint: $\displaystyle \frac{\pi}{3}+\frac{\pi}{4}=\frac{7\pi}{12}$ and $\displaystyle \frac{\pi}{4}-\frac{\pi}{3}=\frac{-\pi}{12}$ Think sum and difference identities. Good luck.
Last edited by TheEmptySet; Jun 12th 2008 at 04:25 PM. Reason: typo
Originally Posted by TheEmptySet $\displaystyle \frac{\pi}{3}+\frac{\pi}{4}=\frac{7\pi}{4}$ Should be $\displaystyle \frac{\pi}{3}+\frac{\pi}{4}=\frac{7\pi}{12}$
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