Exhibit 1.1 VAN KAMPEN UNIT TRUSTS, SERIES 836 TRUST AGREEMENT Dated: January 21, 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 21st, 2009 • Van Kampen Unit Trusts Series 836
