Khan/khan-exercises — Issue #15039: Trigonometry challenge - hardness
Author: KhanBugz
Created: 2012-02-29 22:37:44+00:00
State: open
Labels: chrome, hard, xp

these questions are way too advanced. my dad doesnt know these

[trigonometry_challenge.html?seed=9&problem=6 (graphs_of_sine_and_cosine)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trigonometry_challenge.html?seed=9&problem=6&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trigonometry_challenge.html?seed=9&problem=6&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11

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