解题方法
1 . 在
中,内角
的对边分别为
,且
.
(1)求
的值;
(2)记
的面积为
,点
是
内一点,且
,证明:
①
;
②
.
![](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/3bb2ba2dbca9bb4261d6af5daedcfa09.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e71cd32a9a68ebcc12ced20abcb2f89.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.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/ec15e5cb6d4dc2cf6ba0bedd87514448.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132934e7b441ecb7bd8d6c2fa099a418.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40834b0ca6495ea903d115454618efc.png)
您最近一年使用:0次
解题方法
2 . 在
中,角
,
,
的对边为
,
,
,已知
,且
.
(1)若
,求
;
(2)证明:
;
![](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/5a2264c134952d41fb9bcb90e6c72c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5e009486af263893ca8290be72f258.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd1ebb13cea4b26eb0d58fb84536ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c181f86de3c96a7ef7a1a04c3a438f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a589cd093278256efdb4b3dc2b1c11.png)
您最近一年使用:0次
解题方法
3 . 已知
中,角
,
,
的对边长分别是
,
,
,
,且
.
(1)证明:
;
(2)若
,求
外接圆的面积
![](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/8d5a611bebe78ba33770aec0fe46786a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3af83b4173f604bb5971b1597f9f01a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解题方法
4 . △ABC内角A,B,C的对边分别为a,b,c,若
.
(1)证明;△ABC是钝角三角形;
(2)在四个条件①
②
③
④
中,哪三个条件同时成立能使△ABC存在?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe02d5a322e6f254bd8d51a5b346c61.png)
(1)证明;△ABC是钝角三角形;
(2)在四个条件①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e80df2a4a2a42722dc835702a86c7e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf7e7beb7ca1ffd445c7501bd5e3dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413f9851aad373d782ae62b308f1de85.png)
您最近一年使用:0次
2023-04-03更新
|
735次组卷
|
3卷引用:辽宁省丹东市2023届高三总复习质量测试(一)数学试题
解题方法
5 . 记
的内角A,B,C的对边分别为
,
,
,已知
.
(1)当
为锐角三角形时,证明:
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/e134ce297c1ba1dc3993314190d965a8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c53f612be557f3111535dcde2ab563cd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b577140309da21dec9aac47b2c5ec1.png)
您最近一年使用:0次
名校
解题方法
6 . 在
中,
分别为内角
的对边,且
.
(1)求证:
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141555091b8d53cbbfc6931d4237c70b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e41fa5841af2bf13ac2c5f3218d4746.png)
您最近一年使用:0次
名校
解题方法
7 . 已知
的内角A,B,C的对边分别为a,b,c,面积为S,满足
.
(1)证明![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a93c05337d718428222cced9e91d06.png)
(2)求所有正整数k,m的值,使得
和
同时成立
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5bdcd8cdc2c065464b018447307a77a.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a93c05337d718428222cced9e91d06.png)
(2)求所有正整数k,m的值,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d3487d0bd7b90ca3a6f34c58d34154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c830d8faa17e4c1310f7d255e77781.png)
您最近一年使用:0次
2022-10-11更新
|
1754次组卷
|
5卷引用:安徽省江南十校2022届高三下学期3月一模理科数学试题变式题16-20
(已下线)安徽省江南十校2022届高三下学期3月一模理科数学试题变式题16-20江苏省四校(无锡市辅仁高级中学、江阴高中、宜兴一中、常州市北郊中学)2022-2023学年高三下学期4月阶段性测试数学试题江苏省苏州大学2022届高三下学期5月高考前指导数学试题广东省六校联盟2023届高三上学期第二次联考数学试题福建省泉州市安溪铭选中学2024届高三下学期4月质量检测数学试题
名校
解题方法
8 . 记
的内角
,
,
的对边分别为
,
,
,已知
.
(1)证明:
;
(2)若
,
的面积为2,求
的周长.
![](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/8a998713e1124916abef1110371b4b20.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378ef7c71791ea5d7be880add2dd5f95.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac43be79b48067b47b49debff37ad21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2022-11-03更新
|
512次组卷
|
2卷引用:山西省大同市煤矿第二中学校2023届高三第四次模拟考试数学试卷
名校
解题方法
9 . 已知在
中,内角A,B,C的对边分别为a,b,c,且
.
(1)若
,求证:
为直角三角形;
(2)若
的面积为
,且
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e9331a0aeb6be20548b99981a93c75.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe29c42302504e7fd8577dbc7d130ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2022-10-27更新
|
716次组卷
|
3卷引用:专题4-3 三角函数与解三角形典型大题归类-1
名校
解题方法
10 . 记
的内角A,B,C的对边分别为a,b,c,已知
.
(1)证明:
;
(2)若
的面积最大值为
,求c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d613defbe6e447433fcc072829eb0785.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37238084e3ac028b0378bff6ab377c8b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
您最近一年使用:0次