arctan(1/3)+arctan(1/2)的值为?
arctan(1/3)+arctan(1/2)的值为?
arctan1/3+arctan(-2)的值为
计算:arctan(1-x)+arctan(1+x)的值
1'求arctan1/3+arctan(-2)的值;
arctan(-2)+arctan(-3)=?
求arctan1/3+arctan(-2)的值
求arctan1/3+arctan(-2)的值.
求值:sin[1/2arctan(-4/3)]
arctan(3/4)的值
(arctan√3) - (arctan-1)求解
谁帮求下反三角函数值 arctan(-1)
求证:arctan 1/2+arctan 1/5+arctan 1/8=π/4