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February 28, 2015

February 28, 2015

Posted by **Sally** on Sunday, July 7, 2013 at 4:16pm.

- Math -
**Steve**, Sunday, July 7, 2013 at 4:32pmby definition, arctan(tan(x)) = x

But if you want the principal value for arctan, that is between -pi/2 and pi/2

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