import isnumber from "./isnumber";
import { ERRORTYPES as error } from "./error";Copyright 2015-2021 JC Fisher
import isnumber from "./isnumber";
import { ERRORTYPES as error } from "./error";Compute the inverse arctangent (in radians) of the given number
export default function atan(x) {Ensure value is a number
if (!isnumber(x)) {
return error.value;
}Compute value
return Math.log((1 + x) / (1 - x)) / 2;
}