名校
解题方法
1 . 设向量
,
的夹角的余弦值为
,
,
,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/f30d314a642667fef559032264647366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29276b43a2950ed71f0f9629a35dfa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2396cac4b185cf1f1a67dad9248481c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d706bf6fdca693e77cfe740fa0baf06.png)
A.-23 | B.23 | C.-27 | D.27 |
您最近一年使用:0次
2024-06-17更新
|
395次组卷
|
3卷引用:陕西省西安市南开高级中学2023-2024学年高一下学期五月月考数学试卷
陕西省西安市南开高级中学2023-2024学年高一下学期五月月考数学试卷甘肃省金昌市永昌县第一高级中学2023-2024学年高一下学期期中考试数学试卷(已下线)高一下期末考前押题卷01-期末考点大串讲(人教B版2019)
名校
解题方法
2 . 已知
是
外接圆的圆心,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca902cd1857b0b95703521972a4214eb.png)
A.10 | B.12 | C.20 | D.5 |
您最近一年使用:0次
名校
解题方法
3 . 已知平行四边形
中,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a636af185de5aebf115a28b1e205d88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-06-14更新
|
299次组卷
|
3卷引用:陕西省西安市第一中学2024届高三下学期高考预测数学(文科)试题
解题方法
4 . 已知菱形
的边长为
为菱形的中心,
是线段
上的动点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141f7ca46b674c470f163dd6bd8ceb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/970e9d2b537324dbc689df575534ecd1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
5 . 若平面向量
,
,
两两夹角相等,且
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37564ec4e9e92485f1769e8ffaac31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e8744362c6e224146461b97faf9821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da379cb8150c40e1f5c838be5a574751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d59e1b0b14d7aebd0a62e985d145d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bca8c29cf4f1c6f6cf264142ee4337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018b2ae7a05af196afbd8942c3056630.png)
A.49 | B.7 | C.49或7 | D.7或![]() |
您最近一年使用:0次
名校
解题方法
6 . 在
中,角
的对边分别为
,且
,
,则
( )
![](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/1332569961b96f38eb4ef97402623bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c337b7aaaf6fbc17283e0429f7b561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ad254e88d57298a7b4f932ec7d613f.png)
A.![]() | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
2024-05-09更新
|
1231次组卷
|
6卷引用:陕西省咸阳市武功县普集高级中学2023-2024学年高一下学期5月期中数学试题
名校
解题方法
7 . 已知菱形
的边长为1,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7688aebebab3d1a11ae183e7cdd0d9f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854b6db483e918c68ecb5c25aa08aa49.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-05-05更新
|
404次组卷
|
2卷引用:陕西师范大学附属中学2024届高三下学期第十次模考数学(理)试卷
解题方法
8 . 如图,在平面四边形
中,
为等边三角形,
2,当点
在对角线
上运动时,
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff0e2803236715cd4f9f5213ea6fa6c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a295e537f3b2845816e249e207d86da.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
9 . 若向量
,
的夹角是
,
是单位向量,
,
,则向量
与
的夹角为( )
![](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/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fa8ea29001bb1f0c1e5157aff2fca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fca09e3b4a7126eb507b9269b4eacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-05-02更新
|
211次组卷
|
3卷引用:陕西省渭南市富平县蓝光中学2023-2024学年高一下学期6月月考数学试题
解题方法
10 . 在边长为2的正方形
中,
为
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37be7ee13943884b81300bf2abaf08a2.png)
A.1 | B.3 | C.4 | D.6 |
您最近一年使用:0次