On Feb 23, 4:25 ¨Âí¬ ÂòéáÃáîäìå¼â®ãáîä®®®Àðïâïø®ãïí÷òïôåº
> 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.
>
> --
> Posted viahttp://www.ruby-forum.com/.

Thanks, Brain