sin(-17π/3)＝?
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sin(-17π/3)＝?sin(-17π/3)＝?sin(-17π/3)＝?sin(-17π/3)＝?sin(-17π/3)=-sin(17π/3)=-sin(6π-π/3)=sin(π/3)=(√
sin(-17π/3)＝?
sin(-17π/3)＝?
sin(-17π/3)＝?
sin(-17π/3)＝?
sin(-17π/3)=-sin(17π/3)=-sin(6π-π/3)=sin(π/3)=(√3)/2