Khan/khan-exercises — Issue #15297: Unit circle - Unit Circle 2
Author: KhanBugz
Created: 2012-03-03 16:28:12+00:00
State: open
Labels: firefox, other, win7

Reporter: kasperpeulen@gmail.com

Hi I'm a math student, this unit circle thing is really cool, but even more usefull would be some exercises which consider only the values of cos(x),sin(x) at x=(1/6,1/4,1/3,1/2,...)pi because teachers suppose there students know those values out of head, or at least know how to find those (exact) values without using a calculator.. much thanks !

[unit_circle.html?seed=196&problem=degrees](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/unit_circle.html?seed=196&problem=degrees&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/unit_circle.html?seed=196&problem=degrees&debug&activity=%5B%5D)

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