已知
的内角A,B,C所对的边分别是a,b,c,
.
(1)求角B;
(2)若
,求
的面积
,求
的周长l的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4dab9c032b7eb5e8f7d01bfe788c578.png)
(1)求角B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e01ae7e8a4ad8c58c98fdb6a9f8029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
2022·河南南阳·模拟预测 查看更多[3]
河南省南阳市第一中学校2022-2023学年高三上学期第二次阶段考试理科数学试题(已下线)第09讲 拓展四:三角形中周长(定值,最值,取值范围)问题 (高频考点精讲)宁夏银川唐徕回民中学2022-2023学年高二上学期期中考试数学试题
更新时间:2022-09-30 09:49:00
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适中
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【推荐1】△ABC中,角A、B、C所对的边分别为a,b,c,已知
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【推荐2】在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3471484b64504fc545398f52be830010.png)
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(2)若
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【推荐1】从①
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②
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③
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,这三个条件中,任选一个,补充在下面问题中并解答.
的内角A,B,C的对边分别为a,b,c,
,___________,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be4380bdcef1c542604a6ad61642c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
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【推荐2】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168d1ef300f6369d0926ebe0bab70b9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c456f63370d946c7bbb2950abb41ab3.png)
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【推荐1】
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