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January 31, 2015

January 31, 2015

Posted by **Anonymous** on Monday, October 1, 2012 at 12:45am.

f(x) = x − 2 sin x

- calculus -
**Steve**, Monday, October 1, 2012 at 5:02amhorizontal tangent means slope = 0

f'(x) = 1 - 2cosx

1-2cosx=0

cosx = 1/2

x = 2kpi +/- pi/3

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