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求值:cot(-17π/3)=_求详解

题目详情
求值: cot(-17π/3)=_ 求详解
▼优质解答
答案和解析
cot(-17π/3)
=cos(-17π/3)/sin(-17π/3)
=-cos(17π/3)/sin(17π/3)
=-cos(6π-π/3)/sin(6π-π/3)
=-cos(π/3)/-sin(π/3)
=(1/2)/(√3/2)
=√3/3