arctan1-arctan-1等于什么?
问题描述：
arctan1-arctan-1等于什么?
答
arctan1-arctan-1
=π/4-(-π/4)
=π/2
arctan1-arctan-1等于什么?
arctan1-arctan-1
=π/4-(-π/4)
=π/2