2023·全国·模拟预测
解题方法
1 . 在①
,②
,③
这三个条件中任选一个,补充在下面问题中,并作答.
问题:在
中,角A,B,C的对边分别为a,b,c,且
,______.
(1)判断
的形状,并给出证明;
(2)若点D在边AB上,且
,求
面积的最大值.
注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b918af185f7fd14b046933cbb3f5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9242cdfc1bf5d4cf558af05d639a4bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f289ef19c7418a898ea18747aa76e783.png)
问题:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8266e004b9ef28e94e564d771f602e2f.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若点D在边AB上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
注:如果选择多个条件分别解答,按第一个解答计分.
您最近一年使用:0次
2024·全国·模拟预测
解题方法
2 . 记
的内角
的对边分别是
,已知
.
(1)证明:
;
(2)若
为锐角三角形,求
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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1048f4871ca8aa8c438bd8b90889c3.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b552c3b3acbbe27dea23ee900fd2302.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291ba8755981dfc475aba139af8629da.png)
您最近一年使用:0次
2024·全国·模拟预测
解题方法
3 . 在
中,内角
的对边分别为
.
(1)判断
的形状,并证明;
(2)求
的最小值.
![](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/cbcded5f7161182f3041722b84068128.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a97ddfcbc0a53429da0be17ba4d61dee.png)
您最近一年使用:0次
4 . 在
中,角
所对的边分别为
,已知
,
.
(1)求证:
为等腰三角形;
(2)设
的面积为
,若__________,求
的值.
在①
;②
;③
三个选项中,选择一个填入上面空白处,并求解.
![](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/ec9ace3607b01ba963afac4b7b682fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)设
![](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/cf231f8f86fb922df4ca0c87f044cec3.png)
在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e33960233eb0fe6c8261b5cda190ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70da803e607fda32f65593a20b196dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e915fded554d484aab1f7845f7cc122d.png)
您最近一年使用:0次
名校
解题方法
5 . 在锐角
中,内角
所对的边分别为
,
,
,满足
,且
.
(1)求证:
;
(2)已知
是
的平分线,若
,求线段
长度的取值范围.
![](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/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/9ed5deb0e05a5f253ab198b4ccb54b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3c7849c21d8acdeda0f83b4f163457.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f44c181a2f6ae22d5d52b374768dc57.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2023-08-12更新
|
2185次组卷
|
13卷引用:理科数学-【名校面对面】河南省三甲名校2023届高三校内模拟试题(五)
理科数学-【名校面对面】河南省三甲名校2023届高三校内模拟试题(五)2024届山东省五莲县第一中学高三模拟预测数学试题浙江省湖州、衢州、丽水三地市2023届高三下学期4月教学质量检测(二模)数学试题(已下线)数学(云南,安徽,黑龙江,山西,吉林五省新高考专用)(已下线)押新高考第17题 解三角形黑龙江省哈尔滨德强高中2022-2023学年高一下学期期中考试数学试题(已下线)模块二 专题3 解三角形与不等式河南省实验中学2023-2024学年高三上学期第一次月考数学试题(已下线)河南省实验中学2023-2024学年高三上学期第一次月考数学试题变式题15-18(已下线)专题02 解三角形大题江苏省南通市2024届高三高考考前押题卷(最后一卷)数学试题(已下线)专题03 三角函数及解三角形浙江省嘉兴市秀水高级中学2022-2023学年高二下学期5月月考数学试题
2023·全国·模拟预测
解题方法
6 . 在
中,点D在边BC上,
,
.
(1)若
,证明:D为边BC的中点;
(2)从①②两个条件中选取一个作为已知条件,求
.
①
;
②
.
注:如果选择两个条件分别解答,那么按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f47fbf2f128e4c175647bff6add8e9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ee8c2b09d3ce5575e4a332c58ff71c.png)
(2)从①②两个条件中选取一个作为已知条件,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7e75d7342e6f087370d09181b17a4e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
注:如果选择两个条件分别解答,那么按第一个解答计分.
您最近一年使用:0次
2023·全国·模拟预测
解题方法
7 . 已知
的内角A,B,C所对的边分别为a,b,c,点D在边BC上,
,
,
,且
.
(1)证明:
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fcc2395b0f29789352052f247a79805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63437101184ed8342d2bfc59af1fb32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25da94a4be824359ef3102fc4cd44b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f99ef990700f36447aa13121c2d6a2.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b767e7e0ae62c21dc7469c8e0b8572.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212dfc0ea675782f4c65e285acc0d247.png)
您最近一年使用:0次
2022·全国·模拟预测
解题方法
8 . 在①
,②
,③
且
这三个条件中任选一个,补充在下面问题中,并解答.
在△ABC中,内角A,B,C的对边分别为a,b,c,______.
(1)求证:△ABC是等腰三角形;
(2)若D为边BC的中点,且
,求△ABC周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981cb688a4e15d31e7a43115aa701f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa6ae5122d84253a8f5b87da2e389603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e2e6dd48b13e0c4dcd7f0eaf474f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68c4981b1a17cee55c5088c092af9d5.png)
在△ABC中,内角A,B,C的对边分别为a,b,c,______.
(1)求证:△ABC是等腰三角形;
(2)若D为边BC的中点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
您最近一年使用:0次
解题方法
9 . △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