设∠AOD的平分线是OM,∠BOC的平分线是ON
则∠AOD与∠BOC的平分线的夹角就是∠MON
∠AOM=∠AOD/2=42°/2=21°
∠BON=∠BOC/2=34°/2=17°
那么,∠MON=180°-∠AOM-∠BOC=180°-21°-17°=142°
设∠AOD的平分线是OM,∠BOC的平分线是ON
则∠AOD与∠BOC的平分线的夹角就是∠MON
∠AOM=∠AOD/2=42°/2=21°
∠BON=∠BOC/2=34°/2=17°
那么,∠MON=180°-∠AOM-∠BOC=180°-21°-17°=142°