tan(-7π/12)的值等于多少?
问题描述：
tan(-7π/12)的值等于多少?
答
tan(-7π/12)=-tan(7π/12)=-tan(π/4+π/3)=-(1+√3)/(1-√3) =2+√3
tan(-7π/12)的值等于多少?
tan(-7π/12)=-tan(7π/12)=-tan(π/4+π/3)=-(1+√3)/(1-√3) =2+√3