图亮蠢丛敬樱档空
∵AE平分∠BAC,∴∠EAC=12∠BAC=12(180∘−∠B−∠C),又∵AD⊥BC,∴∠DAC=90∘−∠燃旦旅C,∴∠EAD=∠EAC−皮凳∠DAC=12(180∘−∠B−∠C)−(90∘−∠C)=12(∠迟庆C−∠B),即∠EAD=12(∠C−∠B);(2)如图,过点A作AD⊥BC于D,∵FM⊥BC,∴AD∥FM,∴∠EFM=∠EAD=12(∠C−∠B).