Posted by hasee on .
cot^1(2tan(cos^18/17))+tan^1(2tan(sin^18/17))=tan^1300/161

math 
Reiny,
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