Решение примера на Python

[Donix]

z(x,c,k)=arctg(cx^3+dx^2-x)/(cx^3+dx^2)

Подскажите, как в Python 'arctg' записывается?

 

[regnor]

math — Mathematical functions

This module provides access to the mathematical functions defined by the C standard. These functions cannot be used with complex numbers; use the functions of the same name from the cmath module if...

docs.python.org