Khan/khan-exercises — Issue #12535: Trig identities 1 - i cannot understand this question properly 
Author: KhanBugz
Created: 2012-01-31 11:04:02+00:00
State: open
Labels: hard, lion, safari

Reporter: bhuwan1998@hotmail.com

can u show some examples on these types of questions

[trig_identities_1.html?seed=45&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trig_identities_1.html?seed=45&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trig_identities_1.html?seed=45&problem=0&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C14%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22None%20of%20the%20above.%5C%22%22%2C35%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22None%20of%20the%20above.%5C%22%22%2C4%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22%3Ccode%20style%3D%5C%5C%5C%22display%3A%20none%3B%20%5C%5C%5C%22%3E2%3C%2Fcode%3E%5C%22%22%2C4%5D%2C%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%5Cfrac%7B2%7D%7B%5C%5C%5C%5Csqrt%203%7D%3C%2Fcode%3E%5C%22%22%2C3%5D%2C%5B%22correct-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%5Cfrac%7B%5C%5C%5C%5Csqrt%202%7D%7B2%7D%3C%2Fcode%3E%5C%22%22%2C2%5D%5D)

["None of the above.","None of the above.","2","\\frac{2}{\\sqrt 3}","\\frac{\\sqrt 2}{2}"]

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