如图,斜坐标系
中,
,
分别是与x轴、y轴正方向同向的单位向量,且
,
的夹角为60°,定义向量
在斜坐标系
中的坐标为有序数对
,记为
,在斜坐标系
中完成下列问题:
,
,求
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f2b1408644b6ab804d0e0205297f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a13680f71c5f27aeff1e2f8e60739a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f2b1408644b6ab804d0e0205297f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a13680f71c5f27aeff1e2f8e60739a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8799d0d4c14b7c9b813a73f81bf7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9aa1d34d66a6876aa0566c8fc8b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a72cef89bf8b072e51db0a0bea391ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77734cdce3ea45e2e6fdd99d5f27318e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392d58fb7562afdac652b8f8f7dfe4d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a133a1b7a260112072d8b1ff1f350834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c84fc4cb06a4530bdbc77f0da6e1af4.png)
22-23高一下·广东东莞·阶段练习 查看更多[6]
广东省东莞市第五高级中学2022-2023学年高一下学期第一次段考数学试题6.3.2平面向量的正交分解及坐标表示练习(已下线)专题06 平面向量的坐标表示(1)-《重难点题型·高分突破》(人教A版2019必修第二册)(已下线)专题06 平面向量的坐标表示(1)-《重难点题型·高分突破》(苏教版2019必修第二册)陕西省西安中学2023-2024学年高一下学期第一次月考数学试题广东省珠海市六校2023-2024学年高一下学期期中考试数学试卷
更新时间:2024-04-01 19:51:35
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解题方法
【推荐1】如图,A,B是单位圆(圆心为O)上两动点,C是劣弧
(含端点)上的动点.记
(
,
均为实数).
(1)若O到弦AB的距离是
,求
的取值范围;
(2)若
,向量
和向量
的夹角为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4388577dc452ba9d9caf47d81e6f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/eb42224c-aacc-4017-a5a0-0e1094814ea8.png?resizew=148)
(1)若O到弦AB的距离是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390574f9bccc91926d41aea14a7b047f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2bb14024e7a66ecb6016f20792abee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441e1cb44aa28a8f590aea5ae3bd25c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb55c0af0c1295dfc499f31a3e172b2.png)
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【推荐2】如图,在四边形
中,△
是边长为
的正三角形,设
.
![](https://img.xkw.com/dksih/QBM/2020/8/22/2533344925327360/2536000057008128/STEM/74429052fcad49ba8e9f8230a2ba7df9.png?resizew=240)
(1)若
,求
;
(2)若
,
,求
、
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7261cac9e2a0018c0eb9df89fe9e14f1.png)
![](https://img.xkw.com/dksih/QBM/2020/8/22/2533344925327360/2536000057008128/STEM/74429052fcad49ba8e9f8230a2ba7df9.png?resizew=240)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24efa543736b9064b2abe9d35a46308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7a76738cb119310590601bb2c6d8d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c37e1d61eec8ed26329d3ffa79a764b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115358984e1880e2bb899d9251fe7b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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【推荐3】如图,平行四边形
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/b535b27c-bb15-458b-b700-1ec9d90ffc51.png?resizew=244)
(1)用
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b5a51e65e9b56a9970de33ead263a9.png)
(2)若
,分别求
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d64d989fcde31ea381a98b3abfdc438.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/b535b27c-bb15-458b-b700-1ec9d90ffc51.png?resizew=244)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b5a51e65e9b56a9970de33ead263a9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3965a402b4b97b1b842b57edebe18f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15f2f5c88f6b914b6f767586e5934e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ced462ba5100c1f64044cdf2d627aba.png)
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【推荐1】已知
,
,设函数
,其中
.
(1)求
及其函数
的表达式;
(2)若函数
的定义域为
时值域为
,求a,b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c01145cfa98f9ad7fecd8504224bc1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e040db23fd80e30c660d152e70d9c489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d1a7dc5788eca24637aaeed7d5f742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61a65af5b7ab2400eec5499e9a81565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7ac80b964f5baf79f5faa7ac1e2983.png)
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【推荐2】已知
的内角
的对边分别为
,向量
,且
,三角形ABC外接圆面积为
.
(1)求
;
(2)求三角形ABC周长的最大值.
![](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/b899032214692883f53ac48671826d4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df81f174cfec6657ab9c397ba45e5ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf1f865bafd4a820406d336d99f8091.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)求三角形ABC周长的最大值.
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【推荐3】已知平面向量
,
,函数
.
(1)若
,
,求满足方程
的
值;
(2)已知函数
为定义在
上的减函数,且对任意的
,
都满足
,是否存在实数
,使
对任意
恒成立?若存在,求出实数
的取值范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c22e6ec669eec50ab38e980b1df261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d88c3a6897626947b453669d5cb3557c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8821e90fca55bf1b5039d1ee4f2f340.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc80e108ce3955ee4187475627f40ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643dc06d53aa3132f2c40ef213a1d072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2101050389dd439511d14dcbaa829637.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a99795c08360bb7e8124ecf83fbceee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc80e108ce3955ee4187475627f40ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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