Khan/khan-exercises — Issue #9183: Inverse trig functions - Both answers are true
Author: KhanBugz
Created: 2011-12-21 16:08:25+00:00
State: open
Labels: firefox, wrong-or-unclear, xp

Hi, answer was wrong by inverse trig functions with 2pi/3 and only right with 2/3 pi. Perhaps it could be improved that one can write in both ways.

[inverse_trig_functions.html?seed=75&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/inverse_trig_functions.html?seed=75&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/inverse_trig_functions.html?seed=75&problem=0&debug&activity=%5B%5D)

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