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January 30, 2015

January 30, 2015

Posted by **ROBIN** on Thursday, July 18, 2013 at 11:46am.

0<x<2pi

- MATH -
**Steve**, Thursday, July 18, 2013 at 11:48am(2tanx+1)(tanx-1) = 0

tanx = -1/2 or 1

...

Recall in which quadrants tanx is positive or negative

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