解题方法
1 . 已知平面向量
.若向量
与
共线,则实数
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df001676b6da6f1636819274309b3fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a06c8eae3652486cf9e416ce3a8ffc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2 . 已知向量
,
,若
,则锐角
的值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac90aed4e57f0c8d6ee1c02696bcc7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd439dba62f2bacdee64ebf2b3e51aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03481e6a73207be03fdbc1f8e9965b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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3 . 已知向量
,
,若
与
共线且反向,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/750079fe7868fd50c1958bdc4972248d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ba5e6df3bdc570aea6bcc93526affb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1df960feef63dec4790d63f52279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.4 | B.2 | C.![]() | D.![]() |
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2024-05-12更新
|
745次组卷
|
4卷引用:陕西省渭南市临渭区2024届高三下学期质量检测(三模)文科数学试题
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解题方法
4 . 设
的内角
所对的边分别是
且向量
满足
.
(1)求A;
(2)若
,求BC边上的高
.
![](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/7132c2d8b2ff504e6c2ba36c4f6dcfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304c72f61e123c34db3e4eec41d1e5a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b907456faac5d0995bd73f7da94c9b8.png)
(1)求A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267930e3240f9e164c01fc72e9be3ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
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2024-05-12更新
|
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2卷引用:陕西省西安市第一中学2024届高三下学期模拟考试数学(文科)试题
5 . 已知
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c779f2a80be76bb189bc97b7b309c57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca228875e1f647b1299f4323a3f4868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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解题方法
6 . 已知向量
,
,
,若
,则实数k的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fed6074d3273a20a13eafd01a7e51a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6700c13f6c32d1b8a5abf5841300beaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ea1aa58d8406e0d4995ecfe83be0cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a954e2fbc94ef47eefe82dab68ba84.png)
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解题方法
7 . 向量
,
,
.若
三点共线,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1dfc87dc6af7a8485daca14ffd7b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d9d511f65abf8f2090c3418febf664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20db345284ec8b8159b558ada0080837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65183d238c9bc2be73770717d890683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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8 . 若向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1748624e1f8460959a827fa4b55bff34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1748624e1f8460959a827fa4b55bff34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1070a28cb9cb8553c29747d1993b16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.![]() | B.2 | C.1 | D.0 |
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|
767次组卷
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3卷引用:陕西省榆林市2024届高三第二次模拟考试文科数学试题
9 . 已知向量
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6234d132ead5cf8194883f1b3fe22622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8917ef227f25706ea1630ee0beb7dcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8152e66ccac3af2ba08b74c75d61a922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0487d63e1a8f4b74338aaf2c971dbbd1.png)
A.![]() | B.![]() | C.7 | D.8 |
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|
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5卷引用:陕西省咸阳市2024届高三上学期模拟检测(一)文科数学试题
陕西省咸阳市2024届高三上学期模拟检测(一)文科数学试题广东省深圳市深圳科学高中2023-2024学年高二下学期开学考试数学试题(已下线)考点3 平面向量的数量积 --2024届高考数学考点总动员【练】(已下线)6.3.5 平面向量数量积的坐标表示11种常考题型归类(1)-高频考点通关与解题策略(人教A版2019必修第二册)(已下线)6.3.5 平面向量数量积的坐标表示——课堂例题
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解题方法
10 . 3.已知向量
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3de08bc776f3401187163c2901387fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b958a367fa2f08b6202a5a6ebf5e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.![]() | B.![]() | C.2 | D.-2 |
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|
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