Posted by hasee on Thursday, April 4, 2013 at 1:53am.
cot^1(2tan(cos^18/17))+tan^1(2tan(sin^18/17))=tan^1300/161

math  Reiny, Thursday, April 4, 2013 at 8:12am
the cos^18/17 and the sin^18/17 in your expression don't make sense
did you mean cos^1 (18/17) ?
in that case, that would be undefined, since no angle exists such that cosØ = 18/17
same thing would be true for the sine part
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