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December 22, 2014

December 22, 2014

Posted by **kim** on Sunday, April 19, 2009 at 5:31am.

- math -
**Reiny**, Sunday, April 19, 2009 at 7:51amyes,

since tan 2x = 2tan x/(1-tan^2 x)

and cot 2x = 1/tan 2x, you formed the reciprocal correctly

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