证明下列恒等式:(1)、arctanx+arctan(1/x)=pi/2
证明|arctan(x+1)-arctanx|≤1
证明arctanx=0.5arctan(2x/(1-x^2)),|x|
证明恒等式:arctanx+arctan1/x=π/2(x>0)
证明恒等式arctanx—1/2arcos(2x/1+x^2)=π/4 (x≥1)
证明恒等式arctanx+arccotx=π/2
证明arctanx+arctany=arctan(x+y/1-xy),其中xy不等於1
点样证明arctanx+arctan1/x=pi/2
证明lim(x->负无穷)arctanx=-pi/2
arctanx+arctan(1/x)=?已知x>0.
证明恒等式arctanx+arccotx=π/2 , f(x) = arctanx+arccotx, 则有f'(x) =
求微分 ①y=1+lnx/1-lnx ②y=1/2ln[(1+x)/(1-x)]-arctanx 证明恒等式:arcsi
arctanx+arccotx=π/2,(-∞<x<∞) 怎么证明恒等式成立?