解题方法
1 . 如图,在
中,
,点
分别是
的中点.设
.
表示
;
(2)如果
,请判断
的位置关系?用向量方法证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1c68c71dedc4f7767be51893e60924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2c1c9f638336bdc11d3ccc135b5029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1eea45a8f50799dbe8ac66d5b920cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f320bdecd8a360273f0baabe8d4b27.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac476d780de3ed6aa25efa87f661ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de32260ba2cb998f3ffb8449cdaf7708.png)
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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 |
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解题方法
3 . 如图,在
中,
,设
,
.
,
表示
;
(2)若
,
,
与
的夹角为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff400c098ae6bf6abd24651a5a21114e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f386f5b56b07b96f2600da1be15414a1.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/304a7f07db2ec637baadf8f0ab91c85c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1fbde1de351bce74ea7736f16340a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c7d3b256fec1c30b6dd2a7b8e202f7.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/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4119d0e66e51ec383efb03069d88f9bf.png)
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解题方法
4 . 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![]() |
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5 . 对于任意两个向量
,下列命题不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
A.![]() | B.若![]() ![]() ![]() ![]() ![]() |
C.![]() | D.![]() |
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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.![]() |
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2024-05-09更新
|
1227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
7 . 在平行四边形
中,
,
,
,
是线段
的中点,
,
.
,
与
交于点
,
,求
的值;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bbaccd578a43b2397c8bdd50592fa07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9621311d2323bbf59eaff8ae11c289e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192dec6518fe33e5cabc217714051d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28006d6fcbbdc4cec2ea47e27e9a5328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059d6df06a5b85848dc4fa33327f8e07.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6b86735572c3e9cee5e60e749b3bb3.png)
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2024-04-26更新
|
316次组卷
|
5卷引用:陕西省西安市第八十五中学2023-2024学年高一下学期期中考试数学试题
名校
解题方法
8 .
的内角A,B、C的对边分别为a,b,c,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59775a42fe52aba390c49e75fd2f0ad5.png)
A.![]() | B.![]() |
C.角A的最大值为![]() | D.![]() ![]() |
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2024-04-02更新
|
1276次组卷
|
5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
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(已下线)高一 模块3 专题1 第4套 小题进阶提升练 【人教B版】(已下线)高一 模块3 专题1 第4套 小题进阶提升练【北师大版】重庆市第十一中学2023-2024学年高一下学期3月月考数学试题江苏省盐城市东台市安丰中学等六校2024届高三下学期4月联考数学试题
名校
解题方法
9 . 在平行四边形
中,
为
的中点.若
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d8a5d98dbf6d819ef9506632d36d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3c8ad55f55502edab2b5d3a2bd2dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
10 . 已知圆
的半径为2,过圆
外一点
作圆
的两条切线,切点为
,
,那么
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/ab79339b23db0c52bda36194abe1a8d0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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