比较tan(-13π/4)与tan(-12π/5)的大小

问题描述:

比较tan(-13π/4)与tan(-12π/5)的大小

tan(-13π/4)=tan(-5π/4)=tan(3π/4)
tan(-12π/5)=tan(-2π/5)=-tan(2π/5)=tan(3π/5)
3π/5tan(3π/4
tan(-13π/4)