Question

sen4/3$\pi$+sen2$\pi$
2.sen$\pi$/2

Answer 1

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

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