名校
解题方法
1 . 在
中,内角
的对边分别为
,已知
,且
.
(1)求A;
(2)已知角A的平分线交
于点M,若
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba1e7a657ed134e68efd159b606620f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b4cf0b978266374ce8e7782742727c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
(1)求A;
(2)已知角A的平分线交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7facb932529ae0d511d77714cf9e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
解题方法
2 . 在
中,角
,
,
所对的边分别为
,
,
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b43ab02df11b5ae322134bdc1c38a6.png)
(1)求
;
(2)若
,且
的周长为
,求
的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b43ab02df11b5ae322134bdc1c38a6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783d6adfa8fb1352679c5185258d842a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4644d1c970593e98eaaa1da8bdb84bd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-06-08更新
|
295次组卷
|
2卷引用:安徽省金榜教育2023-2024学年高一下学期5月阶段性大联考数学试题
解题方法
3 . 在锐角
中,内角A,B,C的对边分别为a,b,c,已知:
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899965855c91e639fb333dc936da2af.png)
(1)求b和角B;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6426c8c9ef90d8009595b0fcc0b5ffe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899965855c91e639fb333dc936da2af.png)
(1)求b和角B;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed951363174bfc4032b2c0f4b94dd59.png)
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解题方法
4 . 设
的内角
的对边分别为
若
的周长为
则( )
![](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/7132c2d8b2ff504e6c2ba36c4f6dcfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e09303ffaef7f8a7eb7e589da1bd0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-06-04更新
|
509次组卷
|
3卷引用:安徽省蒙城县第六中学2023-2024学年高一下学期阶段性考试数学试卷
名校
解题方法
5 . 锐角
中,角
所对的边分别为
且
.
(1)证明:
;
(2)求
的周长的取值范围.
![](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/7132c2d8b2ff504e6c2ba36c4f6dcfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9507fe9b38d41c01781486529c50225d.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cf6f843bef8553cb43f1fd085fd872.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
6 . 已知a,b,c分别是△ABC的三个内角的对边,且
.
(2)若
,将射线BA和CA分别绕点B,C顺时针方向旋转
,
,旋转后相交于点D(如图所示),且
,求AD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db70fc431bf6feaf60d17266fab392a9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1006d62fa5723dc36286b8f5494f993e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2dba563554805d236372ab3d862cecd.png)
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2024-05-28更新
|
428次组卷
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3卷引用:安徽省江南十校2024届高三3月联考数学试卷
名校
解题方法
7 . 对于
有如下命题,其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.在锐角![]() ![]() |
D.在![]() ![]() ![]() ![]() |
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2024-05-09更新
|
786次组卷
|
4卷引用:安徽省安庆市第一中学2023-2024学年高一下学期5月同步测试数学试卷
名校
解题方法
8 . 已知
的内角
所对的边分别为
,设向量
,
,且
.
(1)求角
;
(2)若
,
的面积为
,求
的周长.
![](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/94e318924a035233b830c7e282d2fa23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce58e0ddad9ab8022d951234dda550f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b907456faac5d0995bd73f7da94c9b8.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-05-07更新
|
985次组卷
|
2卷引用:安徽省安庆市第一中学2023-2024学年高一下学期5月同步测试数学试卷
名校
解题方法
9 . 著名的费马问题是法国数学家皮埃尔·德·费马(1601-1665)于1643年提出的平面几何极值问题:“已知一个三角形,求作一点,使其与此三角形的三个顶点的距离之和最小”费马问题中的所求点称为费马点,已知对于每个给定的三角形,都存在唯一的费马点,当△ABC的三个内角均小于120°时,则使得
的点P即为费马点.在△ABC中,角A,B,C的对边分别为
,且
.若
是
的“费马点”,
.
(1)求角
;
(2)若
,求
的周长;
(3)在(2)的条件下,设
,若当
时,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1eab88a16df610f20dd46a44ba098d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1022688aa22bb65028a43c4aa3aeec08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cfa96349787b9ca2f30335fbe063e0.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d7f1b63365b67a09797c7859eb4abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d8d4a6507c72e5bd965c8d3db5aa2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1376168658dbe7f5b7f4d75fb1db545a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
10 . 在
中,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de1361ab115c5d48dd80ea9469068de.png)
A.若![]() ![]() | B.![]() ![]() |
C.若![]() ![]() | D.![]() |
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2024-05-04更新
|
305次组卷
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3卷引用:安徽省合肥市中国科学技术大学附属中学2023-2024学年高一下学期第一次月考数学试题
安徽省合肥市中国科学技术大学附属中学2023-2024学年高一下学期第一次月考数学试题黑龙江省大庆市实验中学实验二部2023-2024学年高一下学期期中考试数学试卷(已下线)第8题 判断三角形的形状和解的个数(高一期末每日一题)