Khan/khan-exercises — Issue #13707: Trigonometry 1 - Fractions
Author: KhanBugz
Created: 2012-02-13 03:19:25+00:00
State: open
Labels: chrome, hard, win7

It's difficult to see how you reduced 9/9sqrt^2 to just sqrt^2/2

[trigonometry_1.html?seed=29&problem=cosTrig1](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trigonometry_1.html?seed=29&problem=cosTrig1&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trigonometry_1.html?seed=29&problem=cosTrig1&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22%3Ccode%20style%3D%5C%5C%5C%22display%3A%20none%3B%20%5C%5C%5C%22%3E%5C%5C%5C%5Cdfrac%7B2%20%5C%5C%5C%5Csqrt%7B2%7D%7D%7B9%7D%3C%2Fcode%3E%5C%22%22%2C64%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C12%5D%2C%5B%22hint-activity%22%2C%220%22%2C13%5D%2C%5B%22hint-activity%22%2C%220%22%2C16%5D%5D)

["\\dfrac{2 \\sqrt{2}}{9}"]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

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