Khan/khan-exercises — Issue #14253: Trig identities 1 - Wrong answer
Author: KhanBugz
Created: 2012-02-20 22:27:14+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

This has got to be right. Where is this magical inversion coming from?

[trig_identities_1.html?seed=179&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trig_identities_1.html?seed=179&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trig_identities_1.html?seed=179&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22None%20of%20the%20above.%5C%22%22%2C675%5D%2C%5B%22hint-activity%22%2C%220%22%2C187%5D%2C%5B%22hint-activity%22%2C%220%22%2C539%5D%2C%5B%22hint-activity%22%2C%220%22%2C551%5D%2C%5B%22hint-activity%22%2C%220%22%2C560%5D%5D)

["None of the above."]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.10 (KHTML, like Gecko) Chrome/17.0.946.0 Safari/535.10

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