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2014-03-24T12:55:34-03:00
Π = 180 graus

4/3  π  =180.4/3 =720/3 = 240
2π  =180.2=360
π /2 = 180/2 = 90

\frac{sen(240)+sen(360)}{2sen(90)} = \frac{sen(240)+0}{2.1}=\frac{sen(240)}{2}= sen(120)

observando a tabela

sen 120 = cos 30 = (√3)/2

 \frac{ \sqrt{3} }{2}


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