求证arctan1/2+arctan1/5+arctan1/8=pai/4
求证arctan1/2+arctan1/5+arctan1/8=pai/4
arctan1/2+arctan1/5+arctan1/8=
arctan1/2+arctan1/5+arctan1/3
arctan1/3+arctan1/2+arctan1=几,
arctan1/3+arctan1/5+arctan1/7+arctan1/8
arctan1为什么pai/4?
求证arctan1+arctan2+arctan3=pai
A=arctan1/2
证明arctan1/2+arctan1/3=45°
tan(arctan1/5+arctan3)=
arctan1/2+arctan1/3 解答题
求证恒等式:arctanX+arctan1/X=派/2