解题方法
1 . 已知向量
,
,
,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b168037725c96a728d97de02f848ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b087de2ab6e760993ac0714d49844e59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53761996ef7e4228e0110bd4133b5a1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd9736828195f010db4e1f0a9dea7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a2a6696f9c8ca15b3ad2397e9966ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 在
中,设
,
,
分别是角
,
,
的对边,已知向量
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401078c16ea92130b47f728bea699c62.png)
(1)求角
的大小
(2)若
,求
的周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/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/4a657ba20476c15df582f575bcb1a37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d80b987e0dfe4f82e3b2d792628944e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401078c16ea92130b47f728bea699c62.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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2020-01-18更新
|
1506次组卷
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5卷引用:【市级联考】江苏省无锡市2019届高三上学期期末考试数学试题
【市级联考】江苏省无锡市2019届高三上学期期末考试数学试题【全国百强校】江苏省无锡市第一中学2018-2019学年高一第二学期期中考试数学试题(已下线)专题05 正余弦定理的应用-《巅峰冲刺2020年高考之二轮专项提升》(江苏)江苏省盐城市伍佑中学2019-2020学年高三上学期第一次阶段考试数学试题(已下线)第五单元 平面向量( A卷 基础过关检测)-2021年高考数学(文)一轮复习单元滚动双测卷
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3 . 已知向量
=(2,sinθ),
=(1,cosθ),若
∥
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d3a2903003daa05b2954a8ed8c063d.png)
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2019-10-09更新
|
665次组卷
|
8卷引用:江苏省南通市第一中学2018-2019学年高一上学期期末数学试题
4 . 设向量
,
,若
,则实数
的值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516dc8b0f73e4e190ee842861eabbb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc1b8ac9e60aa6e399051f37aaa392b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89879d3524590fe7d253b6e3086de649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 设向量
,
,若
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37747a127a9c714d155988e2c454bae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767445b429363fd42affaa85a621794c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f9e6c625710741305c4d5e12722461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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6 . 已知向量
,
,
,
.
(Ⅰ)若四边形
是平行四边形,求
,
的值;
(Ⅱ)若
为等腰直角三角形,且
为直角,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d3012678bca492113a1bb270983807.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd15623e0b1fd7554db6522a2cf68a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce6fdfd0c8b453e07ba868bcb42c890.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ebe22217348568b997edc94cd72f2a.png)
(Ⅰ)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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2019-07-09更新
|
1209次组卷
|
6卷引用:江苏省无锡市天一中学2020-2021学年高一(平行班)下学期期末数学试题
江苏省无锡市天一中学2020-2021学年高一(平行班)下学期期末数学试题四川省攀枝花市2018-2019学年高一下学期期末数学试题湖北省襄阳五中2019-2020学年高一下学期网上学习3月月考数学试题(已下线)6.3.2 平面向量数量积的坐标表示(精练)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)广东省深圳市南山区华侨城中学2020-2021学年高一下学期3月月考数学试题(已下线)6.3.2-6.3.3平面向量正交分解及坐标表示(练习)-【高效课堂】2021-2022学年高一数学下学期同步精讲课件+课后巩固练(人教A版2019必修第二册)
7 . 已知向量
,
,
(1)若
,求
的值;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569aab6ff0b5ba8a8936876eb4547feb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa07d9660ec3a016b7d9903e09460a5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d76ee2e81f447f84a3e0b39c0388ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60bf8576f348b5944c777798f550ae49.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473c3119baaec1974302a85cf5284252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01b6fb6a1c7a895df528382a5583444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8aaf830ba8ed8a772923d908ee966e.png)
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