From: Brian Candler <b.candler@...>
Date: 2011-02-23T18:25:36+09:00
Subject: Re: Math module not found by Ruby, though it seems to be loaded

Just remove the require 'math': the Math module is built-in. Try it in 
irb:

irb(main):001:0> Math
=> Math
irb(main):002:0> Math.sin(1)
=> 0.841470984807897

Perhaps in a very old version of ruby you had to require it.

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