From: "Thomas R. Corbin" <tc@...>
Date: 2001-12-06T03:04:52+09:00
Subject: [ruby-talk:27578] Re: Help! acos, asin - where?

Mathieu Bouchard wrote:

> 
> On Thu, 6 Dec 2001, Thomas R. Corbin wrote:
> 
>> I found the Math::atan2 (why 2?) method, but haven't figured out how to
>> do
>> acos or asin.   I'm sure I'm missing something simple, but I'm stumped.
>> 
>>         Thanks for your help,
>>         Tom Corbin
>> 
> 
> def Math.asin x; atan2 x,sqrt(1-x*x) end
> def Math.acos x; atan2 sqrt(1-x*x),x end
> 
> ________________________________________________________________
> Mathieu Bouchard                   http://hostname.2y.net/~matju

        Thanks!  This is great... But shouldn't this be in the Math module?
        
        Sorry if I'm missing something.

        Tom Corbin