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January 25, 2015

January 25, 2015

Posted by **Soyer** on Tuesday, April 13, 2010 at 7:51pm.

- trig -
**drwls**, Tuesday, April 13, 2010 at 9:07pmy = -cot(x+(pi/2))

= -cos(x + pi/2)/sin (x + pi/2)

= (-cosx*cospi/2)-sinx*sin pi/2)/

[(sinx cos pi/2)-cosx*sin pi2)]

= -sinx/-cosx = tanx

- trig -
**Bob**, Friday, April 15, 2011 at 10:53pm8========)--------

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