已知O为△ABC的外心,若
,则
=_____ .
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2016高一·全国·课后作业 查看更多[1]
(已下线)同步君人教A版必修4第二章2.5.1平面几何中的向量方法
更新时间:2017-11-27 15:36:43
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【推荐1】在三角形
中,
,
,若
对任意的
恒成立,则角
的取值范围为_____ .
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【推荐2】若将向量
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的坐标是_____ .
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