Question

Чему равен sin(2pi/3)

Answer 1

sin(2π/3)=sin(π-π/3)=sinπ/3=√3/2

Answer 2

$sin frac{2pi}{3}=sin(pi- frac{pi}{3})= sinpi cos frac{pi}{3}-cospi sin frac{pi}{3} =sin frac{pi}{3} = frac{ sqrt{3} }{2}$