已知三角形的三个内角为A、B、C,且
.它们满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26308ea6d8f321d27acbd7f9b131f9f1.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b0d08795b55ceeed7488d8944e0748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9b04e29a3334fd8f6156e6e1f8aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26308ea6d8f321d27acbd7f9b131f9f1.png)
2021高三·全国·竞赛 查看更多[1]
更新时间:2021-09-16 13:28:50
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【推荐1】如图,在
中,角
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在边
上,且
平分
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【推荐2】开封铁塔是宋都开封具有代表性的文物,是文物价值最高、份量最重的宝物之一.1961年,它被国务院定为中国首批国家重点保护文物之一.如图,为测量开封铁塔的高度,选择
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为测量观测点,已知
在水平地面上,开封铁塔
和楼房
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【推荐3】在
中,
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【推荐1】若
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【推荐2】在平面直角坐标系
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【推荐2】已知函数
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【推荐1】在等差数列
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【推荐2】已知
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