sin(-2011π/3)的值
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![sin(-2011π/3)的值](/uploads/image/z/7253478-54-8.jpg?t=sin%28-2011%CF%80%2F3%29%E7%9A%84%E5%80%BC)
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