I showed with this video, recovery of a droped tablespace with Oracle Recovery Manager (RMAN). I droped my tablepace (APPDATA) and restored, recovered this droped a tablespace from RMAN backups.
I think this video shall be interesting for beginner of Oracle Backup and Recovery.
Please try this on test database, if you try on production, may be you loss your critical data.
Don't try on production database
See on YouTube : Recovery of a droped tablespace with RMAN.