1 . 已知等边三角形
的边长为4,D为
的中点,将
沿
折到
,使得
为等边三角形,则直线
与
所成的角的余弦值( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/8/dd7cae0f-d575-49cf-b5a2-3b6ad40d4b31.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f517953a21c2a45fd8465072c44bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaae2200917767407571ef4980c64afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b32b0bbdc46391dab9533f08f2517a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/8/dd7cae0f-d575-49cf-b5a2-3b6ad40d4b31.png?resizew=148)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 在
中,已知
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4376af85e07b29051a812ff3fcda61a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09921d9904335a83078262ce62a473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6dea4033e1abd33eadd2bd9daec0d98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26308ea6d8f321d27acbd7f9b131f9f1.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() |
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2卷引用:福建省福州市第十五中学等五校2023-2024学年高一下学期期中联考数学试题
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3 . 已知在
中,
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3ee68d7386b11e599878fec5c59d57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
A.1 | B.![]() | C.![]() | D.![]() |
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|
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3卷引用:福建省三明第一中学2023-2024学年高一下学期期中考试数学试卷
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4 . 在
中,
,
,
,若满足条件的
有且仅有一个,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbf7575ec7f9c22f3b51084fe190b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810a2cc3f61a961c1196fbd0e11caabb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5卷引用:福建省三明第一中学2023-2024学年高一下学期期中考试数学试卷
福建省三明第一中学2023-2024学年高一下学期期中考试数学试卷福建省南安市侨光中学2023-2024学年高一下学期第2次阶段考试(5月月考)数学试题(已下线)专题03 解三角形问题总结-《期末真题分类汇编》(江苏专用)(已下线)专题03 解三角形(1)-期末考点大串讲(苏教版(2019))(已下线)核心考点3 解三角形与实际应用 A基础卷 (高一期末考试必考的10大核心考点)
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解题方法
5 . 在
中,若
,
,则角
的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2b1828826f51db4e9a1512a48b2f20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6956a1565df34bf6d716cafedeb8236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 如图,为测量山高MN,选择A和另一座山的山顶C为测量观测点从A点测得M点的仰角
,C点的仰角
以及
,从C点测
,已知山高
,则山高
( )m.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4794cf7c57bdd4825d9e6615e2527a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabecf66d94e4094f9cc46fd8ee050f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a61ee9c2a3a4f2690dad01ef53ede1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffdd51cda1514e65f4f3dd506a854562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1248d29d05eceea94ccd45a12bda51b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b3247afa684b10c8e1da99cf33d5b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/7/511583e9-2a49-4bef-bd31-20ad123d0a61.png?resizew=172)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 公路北侧有一幢楼,高为60米,公路与楼脚底面在同一水平面上.某人在点
处测得楼顶的仰角为
,他在公路上自西向东行走,行走60米到点
处,测得仰角为
,沿该方向再行走60米到点
处,测得仰角为
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
8 . 某中学开展结合学科知识的动手能力大赛,参赛学生甲需要加工一个外轮廓为三角形的模具,原材料为如图所示的
是边
上一点,
,要求分别把
的内切圆
裁去,则裁去的圆
的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ed1c410686ae1b30bf08a81b41796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec3710595242f6b1edac668313b6777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6654182f3914d5d0d7b4c7a988fd17ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d096cd7bd8a5a2219fd7dd166bbb8460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 已知
,
,
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f893b47a1378d232db8d122d8d56b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd39b762cd98b2531a50f86b14c5c7c.png)
A.2 | B.1 | C.![]() | D.![]() |
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解题方法
10 . 在
中,角
、
、
的对边分别为
、
、
,若
,又
的面积
,且
,则
( )
![](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/4d0037c350daed54ed9a4d8f67c87c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2df1d745380af6b8305bfd345b2f455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/759ee5f5ca252f6acce1aacea9d17fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92501bab17937ad492dfb8f1fb988a0a.png)
A.64 | B.84 | C.-69 | D.-89 |
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10卷引用:福建省南平市高级中学2023-2024学年高一下学期期中考试数学试题
福建省南平市高级中学2023-2024学年高一下学期期中考试数学试题福建省南平高级中学2023-2024学年高一下学期期中数学试卷重庆市巴蜀中学校2023-2024学年高一下学期3月月考数学试题(已下线)高一 模块3 专题1 第2套 小题进阶提升练重庆市长寿中学校2023-2024学年高一下学期学段考试一(4月)试题(已下线)高一 模块3 专题1 第2套 小题进阶提升练1黑龙江省大庆市实验中学实验二部2023-2024学年高一下学期期中考试数学试卷重庆市清华中学校2023-2024学年高一下学期4月阶段测试数学试题山东省青岛市第五十八中学2023-2024学年高一下学期期中考试数学试题(已下线)专题04 解三角形小题常考题型归类-期末考点大串讲(人教B版2019必修第四册)