题目

If you are a fruit grower—or would like to become one—take advantage of Apple Day to see what’s around. It’s called Apple Day but in practice it’s more like Apple Month. The day itself is on October 21, but since it has caught on, events now spread out over most of October around Britain. Visiting an apple event is a good chance to see, and often taste, a wide variety of apples. To people who are used to the limited choice of apples such as Golden Delicious and Royal Gala in supermarkets, it can be quite an eye opener to see the range of classical apples still in existence, s15．如图所示，在△ABC中，∠ABC与∠ACB的平分线交于点O，根据下列条件，求出∠BOC的度数．      （1）如图1，已知∠ABC+∠ACB=100°，则∠BOC=130°．（2）如图2，已知∠A=90°，求∠BOC的度数．（3）从上述计算中，你能发现∠BOC与∠A的关系吗？请直接写出∠BOC与∠A的关系．