证明:如图:,连接AF,∵AB=AC,∠BAC=36°,∴∠ABC=∠ACB=72°.∵BD平分∠ABC,∴∠1=∠2=36°,∴∠1=∠BAD=36°,∴DA=DB.∵AE=BE,∴FE⊥AB,即FE是AB的垂直平分线,∴FA=FB,∴∠FAB=∠ABC=72°,∴∠3=∠FAB-∠BAC=36°,∵∠ACB=∠3+∠AFC,∴∠AFC=∠ACB-∠3=36°,∴∠3=∠AFC,∴AC=CF,∴AB=CF.