1 . 如图,在平行四边形
中,
,
,
,
,
与
夹角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/9f341b17-57b0-4954-8ee0-843b7d576366.png?resizew=146)
(1)
,求
、
的值;
(2)求
的值;
(3)求
与
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd1d71d5b784194a6594ff29d48a1ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c059a5b58039e3100510a1b48ba8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1589950d71d9714a7a38ad7a31bec7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13e1ba05fc9190170a07bfdcdd269a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304a7f07db2ec637baadf8f0ab91c85c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/9f341b17-57b0-4954-8ee0-843b7d576366.png?resizew=146)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c9f2a0ef9af38989aba64cd6dd6e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b3dff6522c24a955ea87891d2a7b25.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4781e3daa2c4e018ca0ae09bb56abc0f.png)
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2 . 在
中,
,
,
,点
为线段
上靠近
端的三等分点,
为
的中点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc1ba2766874730daaad7d3bb7a8ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() | B.![]() ![]() ![]() |
C.![]() | D.![]() ![]() |
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3卷引用:湖北省部分高中联考协作体2022-2023学年高一下学期期中联考数学试题
湖北省部分高中联考协作体2022-2023学年高一下学期期中联考数学试题辽宁省锦州市辽西育明高级中学2022-2023学年高一下学期期中数学试题(已下线)期中测试卷02-《重难点题型·高分突破》(人教A版2019必修第二册)
名校
解题方法
3 . 已知向量
,
,函数
.
(1)若
,求
的值;
(2)已知
为
的内角
的对边,
,
,且
恰好是函数
在
上的最大值,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb742821b65006201cd6c8a9f5d1636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d040d34d6a7ed1ee0aaeee0f9b787ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675beb8df50d171920eeb89b814a59e5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2758285d3c1d8c16784edbc5f572fc26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0dc2237408b01132ddf094247e35a3.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](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/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e3d87be9f706832ef25537d78a201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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湖北省部分高中联考协作体2022-2023学年高一下学期期中联考数学试题江西省寻乌中学2022-2023学年高一下学期期中考试数学试题(已下线)期中测试卷02-《重难点题型·高分突破》(人教A版2019必修第二册)专题05解三角形(第二部分)
名校
解题方法
4 . 如图,半圆的直径
,
为圆心,
为半圆上不同于
的任意一点,若
为半径
上的动点,则
的最小值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6637f0f7f82ad98bf96ba2cb86b40de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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5卷引用:湖北省部分高中联考协作体2022-2023学年高一下学期期中联考数学试题
湖北省部分高中联考协作体2022-2023学年高一下学期期中联考数学试题四川省成都市成都市第十二中学2022-2023学年高一下学期期中数学试题江西省部分学校2022-2023学年高一下学期5月月考模拟数学试题(已下线)模块一 专题3 平面向量的应用(A)(已下线)模块一专题3 《平面向量的应用》A基础卷(苏教版)
名校
5 . 如图,在菱形ABCD中,
,E,F分别是边AB,BC上的点,且
,
,连接ED、AF,交点为G.
,求t的值;
(2)求
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6d164d835e67e17e38d7cd5cce4ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae7d93ef90564a5ca9d9a79a74245f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057505ce7b11cfb85e490cc44e88ccc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8279e2f4f69e2709bf8d87b485bd67b0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7d6902c8862bd2616be038549f77aff.png)
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4卷引用:湖北省武汉市5G联合体2022-2023学年高一下学期期中联考数学试题
名校
6 . 已知
的内角A,B,C所对边的长分别为a,b,c,O为
的外心,
,
的面积S满足
.若
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1490b1893c24654de1af84b1dc6f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f434335d35aabede3113c980b036be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f6aebbd26b65f4f1395a8f31129a6b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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5卷引用:湖北省武汉市5G联合体2022-2023学年高一下学期期中联考数学试题
7 . 平面内给定三个向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8967f9f2b03a92c954f40b7e82e9a9b.png)
(1)设
,且
与
夹角为锐角,求实数m的取值范围.
(2)设
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93aab485c90dc486e4f497c87f383a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8967f9f2b03a92c954f40b7e82e9a9b.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a702b9da18a3ffb9d507bc90b682a144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b76118bdca6c463cfb19b66f30281c4.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d028381452dc798d18249ce69b82be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93aab485c90dc486e4f497c87f383a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9823f123b9a5a1fb60dac93b1848f3ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b76118bdca6c463cfb19b66f30281c4.png)
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解题方法
8 . 已知△ABC的外接圆的圆心为O,半径为
,
,
在
上的投影向量为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
,则
的值为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ceb0e5ad86a7d2b9a7f967cc116291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083a20abb668d4c26fe5039bd108b40a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89265cbe3abc6b966ce8967fead448b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89265cbe3abc6b966ce8967fead448b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb2d8343970d11b3f3fb73360fe3383.png)
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2卷引用:湖北省黄冈市部分高中2022-2023学年高一下学期期中联考数学试题
名校
9 . 正方形ABCD的边长为4,E是BC中点,如图,点P是以AB 为直径的半圆上任意点,
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/597dab5c-b11f-40df-9afe-e8ee3a6287e4.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd749e516a3f5094b0fa8d95015c7704.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/597dab5c-b11f-40df-9afe-e8ee3a6287e4.png?resizew=145)
A.![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
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|
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|
3卷引用:湖北省黄冈市部分高中2022-2023学年高一下学期期中联考数学试题
名校
解题方法
10 . 如图,在
中,
,
为CD的中点,设
,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/a02a0e88-f5f7-4675-9adf-b08f779e1744.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d6ceed6e5a36193bcb5a557853dbee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f386f5b56b07b96f2600da1be15414a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658ff9921ff96972b0fc95360bb0c65b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/a02a0e88-f5f7-4675-9adf-b08f779e1744.png?resizew=140)
A.![]() | B.![]() | C.![]() | D.![]() |
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