Rails - Sep 2009 - Main Object error

Hi i am applying the formula to find the surrounding distance within 10 km
using ruby

geokit

x=((((acos(sin((''#{lat}''*pi()/180)) *
sin((`latitude`*pi()/180))+cos((''#{lat}''*pi()/180)) *
cos((`latitude`*pi()/180)) * cos(((''#{lng}''-
`longitude`)*pi()/180))))*180/pi())*60*1.1515*1.609344) <= 10)



NoMethodError: undefined method `pi'' for main:Object

Am getting this error help me to solve this.ANd morever i ma not connected
to any databse\


Regsrda
prashanth

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Use Math::PI; please use Google more often.

BTW, I hope you understand sin(''#{lat}'') is also wrong because
of
multiple reasons - but if you don''t, I should leave it to you to
figure out.


--
अभिनव
http://twitter.com/abhinav



2009/9/16 prashanth hiremath
<prashanthhiremath2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>
> Hi i am applying the formula to find the surrounding distance within 10 km
using ruby
>
> geokit
>
> x=((((acos(sin((''#{lat}''*pi()/180)) *
sin((`latitude`*pi()/180))+cos((''#{lat}''*pi()/180)) *
cos((`latitude`*pi()/180)) * cos(((''#{lng}''-
`longitude`)*pi()/180))))*180/pi())*60*1.1515*1.609344) <= 10)
>
>
>
> NoMethodError: undefined method `pi'' for main:Object
>
> Am getting this error help me to solve this.ANd morever i ma not connected
to any databse\
>
>
> Regsrda
> prashanth
>
> >