arctanx的导数是什么 arctanx的图像

1/1 x amp；sup2arctanx的导数是1/1 x sup 2；，设y=arctanx，那么x=tany，因为arctanx prime= 1/tany amp；质数；，和陈诗丹=(siny/cosy) amp；质数；= cosy cosy-siny(-siny)/cos amp；sup2y = 1/cos amp；s