名校
解题方法
1 . 已知
的三边
,
,
成等差数列.
(1)求证:
;
(2)若
不是等边三角形,证明其三边
,
,
的倒数不成等差数列.
![](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)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65cf6a68b7a0e5458c9c816404f71ff9.png)
(2)若
![](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)
您最近一年使用:0次
名校
2 . 定义函数
的“源向量”为
,非零向量
的“伴随函数”为
,其中
为坐标原点.
的“伴随函数”为
,求
在
的值域;
(2)若函数
的“源向量”为
,且以
为圆心,
为半径的圆内切于正
(顶点
恰好在
轴的正半轴上),求证:
为定值;
(3)在
中,角
的对边分别为
,若函数
的“源向量”为
,且已知
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9153386601e89709ded16e6e56cc86b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e80896903107cb0ec517fedffa3f735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e80896903107cb0ec517fedffa3f735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9153386601e89709ded16e6e56cc86b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead0f45df9fc9e5a6a90a048daf15ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b0339e96e32d6fa1a092824850ef8d.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6183bf0dcb6c744b27f6963007bda5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40589f60d5b9e76464c084d80fe92c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeca565ad5dfdba18cf431dd3b84c57e.png)
(3)在
![](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/18c49ca8562b98657ca9c499093f7233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896785f1902334350af510775d152f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76137ec77bd3221aa3842cabebe4910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3941f79eb3ae64e0f735ae45308e5b19.png)
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2024-04-07更新
|
731次组卷
|
2卷引用:重庆市巴蜀中学校2023-2024学年高一下学期3月月考数学试题
名校
解题方法
3 . (1)
的三个内角
成等差数列,
的对边分别为
.求证:
.
(2)已知:
为互不相等的实数,且
,求证:
.
![](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/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043714f337a44c343813c4e34f699211.png)
(2)已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a14c388e1e2e5a2ff1ccf6caffbee0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa4b450e9269a7ef67582e7359f0125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b2d4c175ae8fadf2da3078ec2904d4.png)
您最近一年使用:0次
名校
解题方法
4 . 已知
,
,
分别为
三个内角A,
,
的对边,
.
(1)求证:
;
(2)若
为锐角三角形,且
,求
面积的取值范围.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.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/a3c59168d3b6c99fe4fcf2f001e66b0b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdd813767c3263437ee6e96a1ab75bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb4f9907b03369bbb3b7fa91c6a9d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
名校
解题方法
5 . 在
中,内角
的对边分别为
的面积为
,且
.
(1)证明:
;
(2)若
,求
.
![](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/718b5b48053888ab3b234b8cb56a0fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/078e30318231eb60cd787c7b595d3b6b.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8607bde1fa6cde631a46e921d959a0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ee49209b78441c35512d86ad426275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa6361e919ac07ee6ed642556e1d1ae.png)
您最近一年使用:0次
7日内更新
|
681次组卷
|
3卷引用:江西省多校联考2023-2024学年高一下学期5月教学质量检测数学试卷
江西省多校联考2023-2024学年高一下学期5月教学质量检测数学试卷江苏省扬州中学2024届高三下学期全真模拟数学试卷(已下线)专题05 解三角形大题常考题型归类-期期末考点大串讲(人教B版2019必修第四册)
名校
解题方法
6 . 在锐角△ABC中,角A,B,C所对的边分别为a,b,c,已知
,且
.
(1)求证:
;
(2)若
的平分线交AC于D,且
,求线段BD的长度的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ac99c98d7fd621dbb6595d824c28cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098943e98ad321740f83f0bb67004598.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f44c181a2f6ae22d5d52b374768dc57.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22a688b51f4862f610d3064199aeb336.png)
您最近一年使用:0次
2024-03-13更新
|
1643次组卷
|
6卷引用:河南省济洛平许2024届高三第三次质量检测数学试题
解题方法
7 . 在
中,角
所对的边分别为
且
.
(1)证明:
;
(2)若
,求
的值.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7978f2e215332d8222a0ac9ca18d4f.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/988b7e964e313579ab8869d67d5be007.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a97fcb4eb18ae937fb9cd9c497e82ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
您最近一年使用:0次
解题方法
8 . 在
中,角
所对的边分别为
,且
.
(1)求证:
;
(2)当
取最小值时,求
的值.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab61bd07b07bd5c48184ac1a8e484be.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa8d75a6638e08eedbff8662267da6f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe88f154abb6a40c65750292332515f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e563e032dfdef69b0f357060c27bd4.png)
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2024-01-10更新
|
2073次组卷
|
5卷引用:辽宁省沈阳市2023-2024学年高三上学期教学质量监测(一)数学试题
辽宁省沈阳市2023-2024学年高三上学期教学质量监测(一)数学试题(已下线)考点17 解三角形中的最值问题 --2024届高考数学考点总动员【练】(已下线)6.4.3余弦定理、正弦定理(第1课时)四川省眉山市仁寿第一中学校北校区2024届高三下学期二诊模拟数学(文)试题(已下线)专题05 三角函数
名校
解题方法
9 . 在
中,角
所对的边分别为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d10b05beecfffa370d3e3a93cfc8e20.png)
(1)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36edd882c513de863b0e961f44d9f49e.png)
(2)若
,角
的平分线交
于
.
(I)求证:
.
(II)若
,求
的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.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/5d10b05beecfffa370d3e3a93cfc8e20.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36edd882c513de863b0e961f44d9f49e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069390dd908ff203327958117a226593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8769f745f683ed83006cd7836c3dee.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8e04be3b1d0b66e96517a73cbcbd89.png)
您最近一年使用:0次
名校
解题方法
10 . 已知
中,角A,B,C所对的边分别为a,b,c,且
.
(1)证明:
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa5d5cc749d8b8bad2ef0a5b4cd271e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65c875691cec70bedee102d280f2f31.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06880757d57f2b12384eaf8443f74b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
您最近一年使用:0次
2024-02-14更新
|
1409次组卷
|
10卷引用:河南省焦作市2024届高三一模数学试题
河南省焦作市2024届高三一模数学试题河南省安阳市2024届高三第一次模拟考试数学试卷天一大联考2024届高三毕业班阶段性测试(五) 数学试题(已下线)热点3-3 正弦定理与余弦定理(8题型+满分技巧+限时检测)陕西省安康市高新中学2024届高三下学期2月月考数学(文)试题陕西省安康市高新中学2023-2024学年高三下学期2月月考理科数学试题(已下线)专题1.12平面向量及其应用-重难点突破及混淆易错规避(人教A版2019必修第二册)陕西省咸阳市武功县普集高级中学2023-2024学年高一下学期第1次月考数学试题河南省漯河市高级中学2023-2024学年高一下学期3月月考数学试题青海省西宁市第五中学2023-2024学年高一下学期4月月考数学试题