化简：[tan（5π）/4+tan(5π)/12]/[1-tan(5π)/12]
问题描述：
化简：[tan（5π）/4+tan(5π)/12]/[1-tan(5π)/12]
答
[tan（5π）/4+tan(5π)/12]/[1-tan(5π)/12]
=tan(π/4)+tan(5π)/12]/[1-tan(π/4)tan(5π)/12]
=tan(π/4+5π/12)=tan(2π/3)=-tan(π/3)=-√3