求值:sin(26π/3)+cos(-17π/4)=
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求值:sin(26π/3)+cos(-17π/4)=求值:sin(26π/3)+cos(-17π/4)=求值:sin(26π/3)+cos(-17π/4)=sin(26π/3)+cos(-17π/4)
求值:sin(26π/3)+cos(-17π/4)=
求值:sin(26π/3)+cos(-17π/4)=
求值:sin(26π/3)+cos(-17π/4)=
sin(26π/3)+cos(-17π/4)=sin(8π+2π/3）+cos（-4π-π/4）=sin2π/3+cosπ/4=根号3/2+根号2/2