Khan/khan-exercises — Issue #9856: Trig identities 1 - answer wrong
Author: KhanBugz
Created: 2011-12-30 01:18:44+00:00
State: open
Labels: firefox, snowleo, wrong-or-unclear

Reporter: barkatheart@yahoo.com

if the cos(x)=a/b, then the sec(x) should =b/a. The answer here says that if cos(x)=(sqrt2)/2, then the sec(x)=sqrt2, which is wrong

[trig_identities_1.html?seed=108&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trig_identities_1.html?seed=108&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trig_identities_1.html?seed=108&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22None%20of%20the%20above.%5C%22%22%2C52%5D%2C%5B%22hint-activity%22%2C%220%22%2C36%5D%2C%5B%22hint-activity%22%2C%220%22%2C47%5D%5D)

["None of the above."]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:7.0.1) Gecko/20100101 Firefox/7.0.1

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