在
中,角A,B,C所对的边分别为a,b,c.已知
.
(1)求角A的大小;
(2)若
,
,AD是△ABC的角平分线,求AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7b1db9dc8c1405f05ff80f70dca38c0.png)
(1)求角A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
22-23高一下·安徽滁州·期末 查看更多[7]
安徽省滁州市2022-2023学年高一下学期教学质量监测数学试题吉林省长春市新解放学校2022-2023学年高一下学期期末数学试题(已下线)大招3 角平分线定理(已下线)第14讲 拓展二:三角形中线,角平分线问题-【帮课堂】(人教A版2019必修第二册)(已下线)题型13 6类解三角形公式定理解题技巧云南省大理白族自治州民族中学2023-2024学年高三下学期5月月考数学试卷(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)
更新时间:2023-07-03 14:49:58
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【推荐1】
的内角
的对边分别为
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1201e92dfcb05334be336f7cf02dbb72.png)
(1)求
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(2)若
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的面积为
,求
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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/1201e92dfcb05334be336f7cf02dbb72.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae7888d643678ea18f83f3237732052.png)
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】在
中,角A,B,C的对边分别为a,b,c.已知
,
,
.
(1)求b的值;
(2)求
的值;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2c413253fe5bc1f9287a35e6fc45eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f296989add06c4bc2207a20b0746e533.png)
(1)求b的值;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402f1010e94be78552ed4c45548b1b8.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c6ad0a96c747f52d4543946bd949b5.png)
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【推荐1】已知
中,角A,B,C所对的边分别为a,b,c,且
.
(1)求A的大小;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e4aacd97ac88c7484b5435af418554.png)
(1)求A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce44de66240d43ef0ca8805a70ec1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
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【推荐2】已知
中,内角
所对的边分别为
,且
.
(1)若
,求
的面积S;
(2)若
,求
的面积S的取值范围.
![](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/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e48c6031d723c7fa6e42a8369c7dfab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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【推荐1】函数
的部分图象如图所示,又函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/2c0b229e-6f60-4626-98f9-559d5a3cd539.png?resizew=166)
(1)求函数
的单调增区间;
(2)设
的内角
、
、
的对边分别为
、
、
,又
,且锐角
满足
,若
,
为
边的中点,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d21a63b20d0881772413c41bbaf884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3359b054d487627ecf110cb847d9e1e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/2c0b229e-6f60-4626-98f9-559d5a3cd539.png?resizew=166)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)设
![](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)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d011d6ad89d0b033f96c2efbb314d78.png)
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【推荐2】如图,在平面四边形ABCD中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/4d66caa7-f30a-4b25-a755-73255aadb45a.png?resizew=159)
(1)当
时,求
的面积.
(2)当
时,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb9bc72b64c30f4dabadb4749ed80ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/4d66caa7-f30a-4b25-a755-73255aadb45a.png?resizew=159)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043bbf0b78ceb74515105b972592547f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ddacc71fbf89b0f328c5a6729d10c3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd172042ed396eb8ff692912613fb2d.png)
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