Khan/khan-exercises — Issue #4163: Unit circle - sin(2*pi)=1 but answer is refused
Author: KhanBugz
Created: 2011-10-11 18:37:04+00:00
State: open
Labels: firefox

Reporter: crknadle@gmail.com

Unit circle

question is sin(2*pi) = ?

Unit circle turned 360 degrees counterclockwise shows 2*pi as the angle, shows "1" as the value, with a straight line rather than a triangle, but entering in "1" as the answer is refused.

?

[unit_circle.html?seed=58&problem=radians](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/unit_circle.html?seed=58&problem=radians)

["1","1.00","1"]

Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1 Iceweasel/7.0.1

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