From: Tim Hunter <cyclists@...>
Date: 2003-03-02T08:08:25+09:00
Subject: Re: arctan in ruby

On Sat, 01 Mar 2003 22:30:16 +0100, Frank Thomas wrote:

> Ruby does not offer many trigonometric functions. How can i calculate the
> arcus tangens?
> 

From The Ruby Way, page 111:

def arctan(x)
   Math.atan2(x, 1.0)
end