sin(-2011π/3)的值

sin(-2011π/3)的值
sin(-2011π/3)的值

sin(-2011π/3)的值
sin(-2011π/3)
=-sin(2011π/3)
=-sin(670π+π/3)
=-sin(π/3)
=-√3/2

原式=sin（-2011π/3+335×2π)=sin(-2011π/3+2010π/3）=sin（-π/3）=-sin（π/3）=-√3/2

-sin（2011π/3）=-sin(667π+π/3)=sin(π/3)
3^2/2