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1 . 设
,若
,则
的最小值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f07029c97c324d32f258f18a96654a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3865838ac7113284e143febacca92107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd9042cf85411bb0b27c49d76f18e2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-06-08更新
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525次组卷
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2卷引用:辽宁省抚顺市六校协作体2022-2023学年高一下学期期末考试数学试题
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解题方法
2 .
的内角
的对边分别为
,且
.
(1)求
;
(2)若
为锐角三角形,
,求
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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2015b447c355913138f34e957d1f86.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2023-06-03更新
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3卷引用:辽宁省葫芦岛市联合体2022-2023学年高一下学期第二次考试数学试题
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解题方法
3 . 已知
中,
,
,
(1)求
;
(2)若点D为BC边上靠近点B的三等分点,求
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf7e7beb7ca1ffd445c7501bd5e3dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91c2510fe763bbfcb100c971cb208060.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
(2)若点D为BC边上靠近点B的三等分点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
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2023-06-03更新
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4 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e993fee2a2160ca5201fd08b14c0aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adee88406d7e6325bc79427074a6b5e2.png)
A.![]() | B.0 | C.![]() | D.1 |
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2023-05-29更新
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8卷引用:辽宁省抚顺德才高级中学2023届高三下学期硬核提分(七)数学试题
辽宁省抚顺德才高级中学2023届高三下学期硬核提分(七)数学试题重庆市万州第三中学2023届高三5月模拟数学试题(已下线)高考试题探源与扩展系类 专题1 瞄准方向,精巧转化(已下线)高考试题探源与扩展系类 专题7 三角求值,细致入微陕西省西安市2024届高三第一次质量检测文科数学试题陕西省西安市2024年高三第一次质量检测理科数学试题2024年新高考Ⅰ卷浙大优学靶向精准模拟数学试题(四)江西省南昌市第十九中学2024届高三下学期第四次模拟考试数学试卷
5 . 如图,在
中,角A,B,C所对的边分别为a,b,c,
,角C的平分线交AB于点D,且
,
.
(1)求
的大小;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b79052d3a75827d539366a2e243a4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adce79579360c94699123b74bb2795ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7650cede07c4758a9b3bb1da4553acc5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/1/5989e3e3-bb07-481a-b4ce-42dff1f865b6.png?resizew=172)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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4卷引用:辽宁省抚顺德才高级中学2023届高三硬核提分(二)数学试题
辽宁省抚顺德才高级中学2023届高三硬核提分(二)数学试题河北省唐山市第十中学2023届高三模拟数学试题湖南省郴州市宜章县四校2023届高三模拟数学试题(已下线)重难点突破02 解三角形图形类问题(十大题型)-1
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6 . 已知
为第二象限角,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a90ede75728823f40b5d225adc4657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd6b5cef6e31705cf2b2ea5b51803f4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3卷引用:辽宁省沈阳市第一二〇中学2022-2023学年高一下学期第三次质量监测数学试题
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解题方法
7 . 已知
中,角A,B,C的对边分别为a,b,c,且
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87bc32b6f40d08aa69df143366045510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6537e1c1c71a5ce17a956d80ec200b82.png)
A.4 | B.6 | C.![]() | D.![]() |
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2023-05-20更新
|
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5卷引用:辽宁省辽东区域教育科研共同体2022-2023学年高一下学期期中考试数学试题
辽宁省辽东区域教育科研共同体2022-2023学年高一下学期期中考试数学试题(已下线)第02讲 解三角形专题期末高频考点题型秒杀(已下线)模块一 专题3 解三角形(1)(人教B)浙江省舟山中学2022-2023学年高一下学期5月月考数学试题新疆生产建设兵团第三师图木舒克市第一中学2022-2023学年高一下学期6月月考数学试题
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解题方法
8 . 在
中,角
,
,
所对边分别为
,
,
,已知
,
,
.
(1)若
,求
;
(2)若
边上的中线长为
,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/661339123b3d302328e185fbbd6414bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66afcba83333c32d82299a5c7bfb6d96.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec85f29c0860b57a8f0cf8098c13a97e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
9 . 已知
的内角
,
,
的对边分别为
,
,
,
.
(1)求角
;
(2)若
,
,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/cb2c6d65e4fd7fa0745e9dceb75721e9.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680f5d2533547bd9302a8caf496f4b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2023-05-14更新
|
828次组卷
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5卷引用:辽宁省沈阳市郊联体2022-2023学年高一下学期期末数学试题
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10 . 在锐角
中,角A,B,C的对边分别为a,b,c,某数学兴趣小组探究该类三角形时,得出以下四个结论,甲:
;乙:
;丙:
;丁:
.则上述四个论断中恒成立的是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a575989aa958895740efec792105947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b18f02785ed9f454cf3ce2b365ac04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d36bf49f2ee1ea8a01bd166aadced21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbce802fea33b184885dcf006ef01e48.png)
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2023-05-14更新
|
272次组卷
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2卷引用:辽宁省沈阳市郊联体2022-2023学年高一下学期期末数学试题