计算:arctan1/2-arctan(-2)
计算:arctan1/2-arctan(-2)
求arctan1/3+arctan(-2)的值
arctan1/3+arctan(-2)的值为
求arctan1/3+arctan(-2)的值.
1'求arctan1/3+arctan(-2)的值;
arctan1/2+arctan1/5+arctan1/8=
arctan1/2+arctan1/5+arctan1/3
arctan1/3+arctan1/2+arctan1=几,
求证arctan1/2+arctan1/5+arctan1/8=pai/4
arctan1/2+arctan1/3 解答题
不定积分问题:1)∫arctan1/xdx 2)∫arctan√xdx (dx前为根号X)
arctan1+arctan2+arctan等于多少