发布时间:2023-02-25 点此:16次
arctanx的导数是什么
1. arctanx的导数是1/1+x2
2. 设y=arctanx,则x=tany.
因为arctanx '=1/tany',而tany' =(siny/ cozy)'= cosycozy siny (- siny)/cos2y=1/cos2y.
然后arctanx ' = cos2y = cos2y / sin2y + cos2y = 1/1 + tan2y = 1/1 + x2。
arctanx的导数是1/1+x2