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- Jan 26, 2012
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Thank you to anemone for this problem!
Prove \(\displaystyle \tan 55^{\circ}\tan 65^{\circ}\tan 75^{\circ}=\tan85^{\circ}\).
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Prove \(\displaystyle \tan 55^{\circ}\tan 65^{\circ}\tan 75^{\circ}=\tan85^{\circ}\).
--------------------
Remember to read the POTW submission guidelines to find out how to submit your answers!