当|x|≤1时,arcsin(2x/(1+2x^2))=2arctanx
证明:2arctanX+arcsin(2X/(1+X^2))≡π,(X>=1)
证明当x>0时,arctanx+1/x>π/2
当x>0时,证明:arctanx+1/x>π/2,
y=90+arctanx/(x-2) y=0.5*arccos1/根号(4-x^2) y=arcsin(x^2-x+1)
在X→0时求(x-arctanx(1+x^2))/(x^2*arctanx)的极限
当X≥1时,arctanx+arccox(2x/1+x2)=π/4
∫x-arctanx/1+x^2
(x-arctanx)/1+x^2 的积分
求导 y=arcsin(1-x^2)/(1+x^2)
y=arcsin[2x/(1+x^2)] 求导
y=arcsin(x^2+x+1)的值域
证明当x>0,arctanx+arctan1/x=π/2