Question

Вычислите sin(-2пи/3)

Answer 1

$sin(- frac{2 pi }{3} )=-sin frac{2 pi }{3} =-sin( pi - frac{ pi }{3} )= \ =-sin frac{ pi }{3} =- frac{ sqrt{3} }{2}$

Answer 2

sin(-2π/3)=-sin2π/3=-sin(π-π/3)=-sinπ/3=-√3/2