Posted by ROBIN on Monday, July 15, 2013 at 9:01pm.
solve for theda given 0<theda<2pi
cos theta=  (sqrt 3)/ 2

MATH  Steve, Tuesday, July 16, 2013 at 9:40am
you 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 10:56pm
so ould it be sin pi.6 and tan pi/6??
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