解题方法
1 . 已知
,
为单位向量,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff1cca0653d9f8f3eaa64e0d215047e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f36d065e81f9f043cc0706d75bb44a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff1cca0653d9f8f3eaa64e0d215047e.png)
您最近一年使用:0次
解题方法
2 . 已知向量
,
的夹角为
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f172a58495387f7934fafd473957cf8.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29276b43a2950ed71f0f9629a35dfa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b311957e153c4ebb3c77fbd58e3a7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f172a58495387f7934fafd473957cf8.png)
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3 . 已知向量
均为单位向量,
,向量
与向量
的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4961a7dd688b8a12db7d1d3480c6b87f.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b901cc29a51575d40f331c7b9b1e696f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7796cec50ed668e457ae5398295533af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf686a7c5e97a93e80130fc04b70305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28200a74a4de76985d41b454d859378.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4961a7dd688b8a12db7d1d3480c6b87f.png)
您最近一年使用:0次
2023-07-20更新
|
749次组卷
|
3卷引用:山西省运城市运城中学2023届高三第二次模拟数学试题
解题方法
4 . 已知
,
,
与
的夹角为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fc7a342293983cc4865498c121493d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a593f5a5b0b6d5a3e4bb0481875af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0188c51e7824fa75f152e7be6e8dfa9.png)
A.2 | B.![]() | C.![]() | D.4 |
您最近一年使用:0次
2023-05-12更新
|
853次组卷
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3卷引用:山西省太原市、大同市2023届高三二模数学试题
名校
解题方法
5 . 已知
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6162a5016f245659468746746a69005.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fc7a342293983cc4865498c121493d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a31604d8909d500e9047e9a3b1f5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c033efa57f621462adb624dbbd889669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6162a5016f245659468746746a69005.png)
您最近一年使用:0次
2023-04-08更新
|
648次组卷
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4卷引用:山西省部分学校2023届高三下学期4月模拟考试数学试题
6 . 在
中,
分别为内角
的对边,点
在
上,
.
(1)从下面条件①、②中选择一个条件作为已知,求
;
(2)在(1)的条件下,求
面积的最大值.
条件①:
;
条件②:
.
注:若条件①和条件②分别解答,则按第一个解㯚计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddcfd39bb0e6c90954cb27f9d29a8824.png)
(1)从下面条件①、②中选择一个条件作为已知,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)在(1)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c02cfd27071a75f0a4ca5860e08a37b.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0c8596fa32b6e42eae3644514d0861.png)
注:若条件①和条件②分别解答,则按第一个解㯚计分.
您最近一年使用:0次
2023-03-26更新
|
840次组卷
|
3卷引用:山西省太原市2023届高三一模数学试题
7 . 设向量
,
的夹角为
,且
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29276b43a2950ed71f0f9629a35dfa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e405db6c09d6ab5739cabbb63cd3b3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ee058d80bf1f695e71ad49beb81f81.png)
A.![]() | B.4 | C.![]() | D.2 |
您最近一年使用:0次
8 . 在①
;②
;③
这三个条件中任选一个补充在下面的问题中,并解决该问题.
问题:在
中,角
,
,
所对的边分别为
,
,
,且______.
(1)求角
的大小;
(2)若
,
,
边上一点
满足
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7541a1f1479a2db814554e06e5b672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1de56bcadba308706c29cc9a773f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e2c43a12bfd6e0fc9ae232e869050b.png)
问题:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed40bce11976e6d1a7274116c69c379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4448a069a477b7a5a81a75d3469fc5.png)
您最近一年使用:0次
2023-02-03更新
|
748次组卷
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4卷引用:山西省2023届高三一模数学试题
山西省2023届高三一模数学试题山西省晋中市、大同市2023届高三上学期1月适应性调研数学试题(已下线)专题07三角函数与解三角形(解答题)(已下线)技巧04 结构不良问题解题策略(5大题型)(练习)