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September 23, 2014

September 23, 2014

Posted by **Ian** on Saturday, December 11, 2010 at 2:24am.

- college math -
**Henry**, Saturday, December 11, 2010 at 11:36pmsec(13pi/6) = sec((13p1/6)*180/pi) =

sec(390 deg) = sec(390 - 360) = 30 deg,

sec(30 deg) = 2(sqrt3) / 3.

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