计算:cos13π/4+tan(-11π/6)=?
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计算:cos13π/4+tan(-11π/6)=?
计算:cos13π/4+tan(-11π/6)=?
计算:cos13π/4+tan(-11π/6)=?
原式=cos5π/4+tanπ/6
=-cosπ/4+tanπ/6
=-(根号2)/2+(根号3)/3
计算:cos13π/4+tan(-11π/6)=?
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