解:(1)依題意,得∠AOC+∠BOD=∠AOB-∠COD=110°,
∵OE平分∠AOC,OF平分∠BOD,
∴∠COE+∠DOF=
(∠AOC+∠BOD)=55°,
∴∠EOF=∠COE+∠DOF+∠COD=55°+22°=77°;
(2)依題意,得∠COE+∠DOF=∠EOF-∠COD=α-β,
∵OE平分∠AOC,OF平分∠BOD,
∴∠AOE+∠BOF=∠COE+∠DOF=α-β,
∴∠AOB=∠EOF+∠AOE+∠BOF=α+α-β=2α-β.
解析分析:(1)根據(jù)角的和差關(guān)系求∠AOC+∠BOD,再根據(jù)角平分線的定義求∠COE+∠DOF,由∠EOF=∠COE+∠DOF+∠COD求值;
(2)由∠EOF-∠COD=∠COE+∠DOF,由角平分線2的定義可知∠COE+∠DOF=∠AOE+∠BOF,由圖形可知∠AOB=∠EOF+∠AOE+∠BOF.
點(diǎn)評(píng):本題考查了角的計(jì)算,角平分線的定義.關(guān)鍵是根據(jù)圖形,結(jié)合角平分線的定義得出角的和差關(guān)系.