在锐角△ABC中,角A,B,C的对边分别为a,b,c,且
.
(1)求角B的大小;
(2)从条件①
;条件②
这两个条件中选择一个作为已知,求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1424eb3eca9492bdeae16ef3f4213663.png)
(1)求角B的大小;
(2)从条件①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1846c1f2408a78576e1f5cb20820a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2007bb75653129572cf63d2b9bcc279.png)
2021·湖南长沙·一模 查看更多[11]
湖南省长沙市一中2021届高三下学期一模数学试题(已下线)第六章 解三角形专练7—结构不良型问题(大题)-2022届高三数学一轮复习甘肃省武威市武威六中2020-2021学年高三第十次诊断考试数学(文)试题甘肃省武威市武威六中2020-2021学年高三第十次诊断考试数学(理)试题陕西省延安市第一中学2021-2022学年高一下学期期末数学试题内蒙古赤峰二中2022-2023学年高二上学期期末考试数学(文)试题(已下线)6.4.3 余弦定理、正弦定理 (第3课时)应用举例(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)广东省广州市第一一三中学2022-2023学年高一下学期阶段二考试(5月)数学试题(已下线)模块三 专题6 大题分类练(解三角形)(基础夯实练)(人教A)(已下线)模块三 专题6 大题分类练(解三角形)(基础夯实练)(苏教版)四川省仁寿第一中学校南校区2023-2024学年高二上学期入学考试数学试题
更新时间:2022-11-04 08:49:29
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【推荐1】在△ABC中,角A,B,C的对边分别为a,b,c,已知
.
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab29f045e046a3698624d6cf19de7e6f.png)
(2)若
,
,求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b626c78057d7e0a8704f147e1ebf3c2.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab29f045e046a3698624d6cf19de7e6f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa79a550591eb9e1bd07bced3a08fc.png)
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【推荐2】在
中,角
的对边分别是
,满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38567c2b3c1b9b2ca24fa200ed38b29.png)
(1)求角B的大小
(2)
,求
的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38567c2b3c1b9b2ca24fa200ed38b29.png)
(1)求角B的大小
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba9de45eb15c364a2fa2509000ae2503.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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【推荐1】在平面四边形中,
平分
,
.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aca3818e264b4504dbc3e3d7a22cd97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】记
的内角
的对边分别为
,分别以
为边长的三个正三角形的面积依次为
,已知
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(1)求
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf4e20ea341827ce5f9552daee39462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63d9b441f6d50079ac4eeb8ff0aca8b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0b1953dbd7c85eb8ebda18e748d745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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【推荐1】如图,四边形
中,
的面积为
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/6a6f02a1-6194-436e-b145-4364454f642b.png?resizew=152)
(1)求
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(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56b52ea7f86af41c5eef78cd16829e7c.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/6a6f02a1-6194-436e-b145-4364454f642b.png?resizew=152)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
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【推荐2】在
中,角
的对边分别为
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(1)求
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(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29e4bc007d8acdc443a79cf32bb8b15.png)
(1)求
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(2)求
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