You can check that by query plan

Below query give you all non clustered index usage of tables..

SELECT OBJECT_NAME(ddius.[object_id]) AS [Table Name] ,

i.name AS [Index Name] ,

i.index_id ,

user_updates AS [Total Writes] ,

user_seeks + user_scans + user_lookups AS [Total Reads] ,

user_updates - ( user_seeks + user_scans + user_lookups )

AS [Difference]

FROM sys.dm_db_index_usage_stats AS ddius WITH ( NOLOCK )

INNER JOIN sys.indexes AS i WITH ( NOLOCK )

ON ddius.[object_id] = i.[object_id]

AND i.index_id = ddius.index_id

WHERE OBJECTPROPERTY(ddius.[object_id], 'IsUserTable') = 1

AND ddius.database_id = DB_ID()

-- AND user_updates > ( user_seeks + user_scans + user_lookups )

AND i.index_id > 1

ORDER BY [Difference] DESC ,

[Total Writes] DESC ,

[Total Reads] ASC ;

and this one will give you particular table's index

SELECT s.name, D.*

FROM sys.dm_db_index_usage_stats D

LEFT OUTER JOIN sys.indexes S

ON D.object_id = S.object_Id AND D.index_id = S.index_id

WHERE database_id = DB_ID('DBname') AND d.object_id = OBJECT_ID('tablename');