一架执行任务的飞机从A地按北偏西30°的方向飞行300 km后到达B地,然后向C地飞行,已知C地在A地东偏北30°的方向处,且A、C两地相距300 km,求飞机从B地到C地飞行的方向及B、C间的距离.
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