Khan/khan-exercises — Issue #13678: Inverse trig functions - radians
Author: KhanBugz
Created: 2012-02-12 16:43:22+00:00
State: open
Labels: firefox, wrong-or-unclear, xp

At "inverse trig functions", the system doesn't accept for example 5/3 pi, but only -1/3 pi, whereas these are the same values.

[inverse_trig_functions.html?seed=166&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/inverse_trig_functions.html?seed=166&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/inverse_trig_functions.html?seed=166&problem=0&debug&activity=%5B%5D)

[]

Mozilla/5.0 (Windows NT 5.1; rv:10.0.1) Gecko/20100101 Firefox/10.0.1

MathJax is loaded, ready, queue length: 0