sin(-5/6π）等于-sin（π-π/6）吗,后面又怎么算?
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sin(-5/6π）等于-sin（π-π/6）吗,后面又怎么算?sin(-5/6π）等于-sin（π-π/6）吗,后面又怎么算?sin(-5/6π）等于-sin（π-π/6）吗,后面又怎么算?sin(
sin(-5/6π）等于-sin（π-π/6）吗,后面又怎么算?
sin(-5/6π）等于-sin（π-π/6）吗,后面又怎么算?
sin(-5/6π）等于-sin（π-π/6）吗,后面又怎么算?
sin(-5/6π）=-sin（π-π/6）=-sinπ/6=-1/2