(根号下(1-2tan60°+tan^2 60°))-tan60°
问题描述:
(根号下(1-2tan60°+tan^2 60°))-tan60°
答
(根号下(1-2tan60°+tan^2 60°))-tan60°
=√(1-tan60°)^2-tan60°
=tan60°-1-tan60°
=-1