USE
GO
DBCC SHRINKFILE(, )
BACKUP LOG WITH TRUNCATE_ONLY
DBCC SHRINKFILE(, )
Apply the above syntax to a normal database.The below is the example for it...
USE dbproduct
GO
DBCC SHRINKFILE(dbproduct_log, 10)
BACKUP LOG dbproduct WITH TRUNCATE_ONLY
DBCC SHRINKFILE(dbproduct_log, 10)