作业帮求值sin(-17π/3)
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求值sin(-17π/3)
求值sin(-17π/3)
求值sin(-17π/3)
sin(-17π/3)
=-sin(17π/3)
=-sin(6π-π/3)
=-（-sin(π/3)）
=(√3/2)
sin(-17π/3)=sin(-6π+π/3)=sin(π/3)=(根号3)/2
sin(-17π/3)=sin（π/3）=1/2