1 . 已知向量
,
,且向量
满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7605402b78577eb6fa5b59767e158fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cf82bfa46a77da51af45571e164b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e70b39accf08323cf0d7fc020ad2e0.png)
A.![]() | B.![]() |
C.向量![]() ![]() ![]() | D.向量![]() ![]() ![]() |
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解题方法
2 . 已知在等边三角形
中,点
为线段
上一点,且
.
(1)若等边三角形
的边长为
,且
,求
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbdeb6ed0879e545bca0d242b56b736f.png)
(1)若等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1c3ea872a20fdc1843cb5ffce8a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c389ddaeb581cd8460adf4c7bba43257.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5c54393d46a9744881efd69b639376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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3 . 在
中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd08cfa103788811e6d78f326e1d5cf.png)
________ ,向量
与
的夹角的大小为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b19819443514c14e3133a657941198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03b93bf1e37d4b54e74b6504deccdee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1029d57b9dfac845964e4f173a6d8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd08cfa103788811e6d78f326e1d5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
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2020·全国·模拟预测
4 . 如图,已知有两个以
为圆心的同心圆,小圆的半径为1,大圆的半径为2,点
为小圆上的动点,点
是大圆上的两个动点,且
,则
的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99066713c8311798f581acdef37511e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b087875ad7156963406bf36c70c126.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634689849024512/2635299210690560/STEM/21e3782cde6e4dd98a2f24a8a5efc574.png?resizew=128)
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解题方法
5 . 若向量
均为单位向量,且向量
的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc917d64da67306bf0e9de423b137f4c.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc917d64da67306bf0e9de423b137f4c.png)
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6 . 已知
中,
,
,
,点
在直线
上,且满足:
(
),则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3ca254e94a873cb6d7566b3ff1d15d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b79d5516cd9815b23986e33a52b118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd9736828195f010db4e1f0a9dea7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f66e2128e142bfb577da99ef1af0be.png)
A.![]() | B.![]() | C.3 | D.6 |
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2021-01-05更新
|
1479次组卷
|
7卷引用:T8联考八校2020-2021学年高三上学期第一次联考数学试题
T8联考八校2020-2021学年高三上学期第一次联考数学试题(已下线)【新东方】高中数学20210323-008【高二下】(已下线)必刷卷05-2021年高考数学(理)考前信息必刷卷(新课标卷)福建省福州永泰县永泰一中2020-2021学年高一下学期第一次月考数学试题吉林省延边第二中学2020-2021学年高一下学期第一次考试月考数学试题湖南省永州市第一中学2021-2022学年高三上学期第二次月考数学试题陕西省西北工业大学附属中学2022届高三下学期第十三次适应性训练理科数学试题
解题方法
7 . 已知
、
、
表示共面的三个单位向量,
,那么
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d753a0a27ec4302346bcee918ebd3e50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2079be0b9d0919862ca5bc8ea565f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2aae44574359b8a27d48014c928e8be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23053bace29d7efed3879f9f43b0a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a3289f556d1169c6df6f540f379d8a.png)
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8 . 在△ABC中,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd08cfa103788811e6d78f326e1d5cf.png)
________ ;若
,则
的面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3ed9a0705db6ab4bdc03c644530da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46f8fd790b959d0ce74a6d8d884c951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd08cfa103788811e6d78f326e1d5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fe102d8edd41578b92b2284e8b6cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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20-21高一上·全国·课后作业
名校
9 . 设向量
,
满足
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af87aab004d50803bd769bf4f82236e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371ba95d0ac2642d0e112ea2430025f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b8769d7bf2001355155359c70d8566.png)
A.2 | B.![]() | C.![]() | D.![]() |
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2020-12-26更新
|
1155次组卷
|
6卷引用:专题10+平面向量的数量积(重点练)-2020-2021学年高一数学十分钟同步课堂专练(人教A版必修4)
(已下线)专题10+平面向量的数量积(重点练)-2020-2021学年高一数学十分钟同步课堂专练(人教A版必修4)山东省济南第一中学2021届高三上学期期中数学试题(已下线)第二章+平面向量(能力提升)-2020-2021学年高一数学单元测试定心卷(人教版必修4)(已下线)2.4.2 平面向量数量积的坐标表示、模、夹角-2020-2021学年高一数学课时同步练(人教A版必修4)西藏自治区拉萨中学2020-2021学年高一下学期期末考试数学试题山东省菏泽市菏泽一中2024届高三上学期11月月考数学试题
19-20高一·浙江·期末
解题方法
10 . 已知平面向量
满足
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9556387d2b008b02cbb215d90982720c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbd92c9b1e8b3b6e1c4053f5a1320d30.png)
A.4 | B.![]() | C.![]() | D.6 |
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