Joining with a result set returned from a UDF (CROSS AND OUTER APPLY)

I have a function which returns a result set. Now I need to join the result
set with a table in a SELECT query. How can I do that?

This question led me to a feature of T-SQL which is APPLY. This comes in
two flavors. They are as follows:
1. Cross Apply
2. Outer Apply

Both are used to join with the result set returned by a function. Cross
apply works like an INNER JOIN and OUTER apply works like LEFT OUTER JOIN.