求值sin(π/3+arctan1/2)
arctan1/2+arctan1/5+arctan1/3
arctan1/3+arctan1/2+arctan1=几,
送分ing,求值:arctan1/2+arctan1/3.
arctan1/2+arctan1/3 解答题
证明arctan1/2+arctan1/3=45°
arctan1/2+arctan1/5+arctan1/8=
arctan1/3+arctan1/5+arctan1/7+arctan1/8
求值:sin[1/2arctan(-4/3)]
求arctan1/3+arctan(-2)的值
arctan1/3+arctan(-2)的值为
求arctan1/3+arctan(-2)的值.
求证arctan1/2+arctan1/5+arctan1/8=pai/4