Exhibit 1.1 VAN KAMPEN UNIT TRUSTS, SERIES 833 TRUST AGREEMENT Dated: January 7, 2009 This Trust Agreement among Van Kampen Funds Inc., as Depositor, The Bank of New York Mellon, as Trustee, and Van Kampen Asset Management, as Supervisor, sets forth...Trust Agreement • January 7th, 2009 • Van Kampen Unit Trusts Series 833
