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Integral Proof (Posted on 2015-01-26) Difficulty: 3 of 5
Prove that

tan6(pi/9) + tan6(2pi/9) + tan6(4pi/9)

is an integer, and find the value of this integer.

No Solution Yet Submitted by Danish Ahmed Khan    
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  Subject Author Date
SolutionFull SolutionBrian Smith2016-06-26 23:33:36
Some Thoughtspossible approach.broll2015-01-26 21:42:55
Some Thoughtsno proof, but the integer is... (spoiler)Charlie2015-01-26 13:24:51
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