We are going to create new environment for windows server cluster with RAC application. we have all ready oracle enterprise licensing oracle , So i can use same licence while installing the RAC application.
The Enterprise Edition does *NOT* include RAC. RAC is a separate Option that you must purchase on top of the Enterprise Edition.
If your reference in "oracle enterprise licensing oracle" is that you have a Corporate-wide (unlimited) licence for Oracle Enterprise Edition, I'd ask you to check with Oracle if it includes the RAC option. imho, it might not (then, again, it might !)