Khan/khan-exercises — Issue #10490: Unit circle - Not specific form
Author: KhanBugz
Created: 2012-01-06 01:21:05+00:00
State: open
Labels: firefox, wrong-or-unclear, xp

-1/2 fails when -.5 is the answer. This is a poor choice for several reasons. 1) The diagram shows -1/2. 2) It does not say "in decimal format" in the question. 3) Many unit circle anwers like fractions due to tus use of pi in many equations. Either rewrite the question or broaden the answer.

[unit_circle.html?seed=185&problem=degrees](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/unit_circle.html?seed=185&problem=degrees&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/unit_circle.html?seed=185&problem=degrees&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22-1%2F2%5C%22%22%2C56%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%2C%5B%22hint-activity%22%2C%220%22%2C7%5D%2C%5B%22hint-activity%22%2C%220%22%2C7%5D%5D)

["-1/2"]

Mozilla/5.0 (Windows NT 5.1; rv:6.0.2) Gecko/20100101 Firefox/6.0.2

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