图就不画了!
∠COB+∠BOD=90
∴∠AOC+∠AOB=360-90=270
∵OE,OF分别是∠AOC,∠AOD的角平分线
∴∠AOE+∠AOF=1/2(∠AOC+∠AOB)=1/2x270=135
∠EOF=∠AOE+∠AOF=135°
∵∠COB+∠BOD=90°
∴∠AOC+∠AOB=360-90=270°
又∵OE,OF分别是∠AOC,∠AOD的角平分线
∴∠AOE+∠AOF=1/2(∠AOC+∠AOB)=1/2x270=135°
∴∠EOF=∠AOE+∠AOF=135°
135
啊