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January 28, 2015

January 28, 2015

Posted by **ROBIN** on Monday, July 15, 2013 at 9:01pm.

cos theta= - (sqrt 3)/ 2

- MATH -
**Steve**, Tuesday, July 16, 2013 at 9:40amyou know that cos π/6 = √3/2

You also know that cos(x) < 0 in QII,QIII

So, ...

- MATH -
**ROBIN**, Tuesday, July 16, 2013 at 10:56pmso ould it be sin pi.6 and tan pi/6??

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