帮忙求下这2个角度是多少?∠arctan(-2/-2√3)和∠arctan(-2/2√3)
大家帮忙求下这2个角度是多少?∠arctan(-2/-2√3)和∠arctan(-2/2√3)
arctan(-2)+arctan(-3)=?
arctan(1/3)+arctan(1/2)的值为?
arctanπ/2=?
arctan根号2是什么,
求arctan1/3+arctan(-2)的值
arctan1/3+arctan(-2)的值为
求值:sin[1/2arctan(-4/3)]
求arctan1/3+arctan(-2)的值.
arctan(A/2)+arctan(A/5)=30
计算:arctan1/2-arctan(-2)
求证:arctan 1/2+arctan 1/5+arctan 1/8=π/4