因为：OC,OD是∠AOB的三等分线
所以：∠AOC = ∠COD =∠DOB = ∠AOB / 3 = 19 度
因为：OE平分∠COD
所以：∠COE = ∠EOD = ∠COD / 2 = 9.5 度
最后：∠BOE = ∠BOD + ∠DOE = 19 + 9.5 = 28.5 度