Khan/khan-exercises — Issue #8285: Trigonometry challenge - Wrong Answer
Author: KhanBugz
Created: 2011-12-10 00:59:15+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: willski.iam@gmail.com

The answer I came up with and the answer from the hint are both the same but neither work as a correct answer!
This is for the following question.
What is the principal value of arctan(3√3)?
Which should be 30 degrees.

[trigonometry_challenge.html?seed=66&problem=7 (inverse_trig_functions)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trigonometry_challenge.html?seed=66&problem=7&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trigonometry_challenge.html?seed=66&problem=7&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2230%5C%22%22%2C40%5D%2C%5B%22hint-activity%22%2C%220%22%2C0%5D%2C%5B%22hint-activity%22%2C%220%22%2C0%5D%2C%5B%22hint-activity%22%2C%220%22%2C0%5D%2C%5B%22hint-activity%22%2C%220%22%2C0%5D%2C%5B%22hint-activity%22%2C%220%22%2C0%5D%2C%5B%22hint-activity%22%2C%220%22%2C0%5D%2C%5B%22hint-activity%22%2C%220%22%2C0%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2230%C2%B0%5C%22%22%2C37%5D%2C%5B%22incorrect-activity%22%2C%22%5C%221%2F6%20pi%5C%22%22%2C11%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2230%5C%22%22%2C37%5D%5D)

["30","30°","1/6 pi","30"]

Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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