Arctan
From specialfunctionswiki
The $\mathrm{arctan}$ function is the inverse function of the tangent function.
Graph of $\mathrm{arctan}$ on $[-20,20]$.
Domain coloring of $\mathrm{arctan}$.
Properties
Derivative of arctan
Antiderivative of arctan
Relationship between arctan and arccot
2F1(1/2,1;3/2;-z^2)=arctan(z)/z
