名校
1 . 已知向量
,且
与
的夹角为
.
(1)求
和
;
(2)若向量
与
所成的角是锐角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032fe13f2666446d08f308d23755eebc.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/ac1a63ab608517bb10aa036783dfb51f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596a3ee5d8473fc6619ea7730e13325b.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba2b0627ff70b02aa16b007dc41794dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437dc907211c5934f938d869f6b19e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
昨日更新
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解题方法
2 . 若单位向量
,
的夹角为
,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/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99959bd70f52ce3fa6eac1a9751c3508.png)
A.![]() | B.![]() | C.4 | D.5 |
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名校
解题方法
3 . 已知向量
,
的夹角为
,
,
,在
中,
,
,
,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/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7958a6bddd1d578bbd6fbcb92e3f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2396cac4b185cf1f1a67dad9248481c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72931604cf23d047739ecac18c7c4818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea026ecfbee4f9255b8cdaad3579d89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a431c7044c63fc06428d1dcd01d45f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa8ee982bb2eb1e2b24bef44f1b8d31.png)
A.2 | B.![]() | C.![]() | D.6 |
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名校
解题方法
4 . 已知向量
满足
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d840607a5e9fb9a63119de449e134e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29276b43a2950ed71f0f9629a35dfa74.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-06-01更新
|
314次组卷
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3卷引用:河南省漯河市源汇区漯河市高级中学2023-2024学年高一下学期5月月考数学试题
名校
解题方法
5 . 两个非零向量
、
互相垂直,给出下列各式:
①
;②
;③
;④
;⑤
.
其中正确的式子有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880c690f1ec31490b96be592c2c748b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e332fdb0d734d6f3015f88ce4d8f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef84d275246c94cd7d9c983231210fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7058f4df5f5789ef6d612e0d8b9e23fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4154cb6dff75b54549bfa7c9ca8e48f.png)
其中正确的式子有( )
A.2个 | B.3个 | C.4个 | D.5个 |
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解题方法
6 . 在三角形
中,令
,
,若
,
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54edefe2335191679f506893c0a1a69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f386f5b56b07b96f2600da1be15414a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b11bdb6f3ed2c9237897928a9e4c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d032e66b3a168e0d9d57ca6357e1d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a63c668acb8ee5f64c5ba1f9d195cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc1f3ea84e7872bc64b7e197333cf55.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() |
D.三角形![]() ![]() ![]() |
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2024-05-01更新
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2卷引用:河南省新乡市原阳县第一高级中学2023-2024学年高一下学期4月月考数学试题
名校
解题方法
7 . 已知向量
与
的夹角为
,且
.
(1)求
;
(2)求
与
的夹角的余弦值;
(3)若
与
夹角为钝角,求实数k的取值范围.
![](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/7f13557c6c4cac12d494b38da6972e5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea600e585f80baea5d47b29b0d7369d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8909bd17a8db2ea7257f24eca00a5e6f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7ef1058ce7a48b534d1452ec1a7111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b9a943b2dda38cfbb7857d7945d289.png)
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2024-04-24更新
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3卷引用:河南省新乡市封丘县第一中学2023-2024学年高一下学期第一次阶段测试数学试题
名校
解题方法
8 . 已知
为单位向量.
(1)若
,求
的夹角;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3558f401b8260cbc0b2dfd3c137fd316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c1e5b013731749932d8926f61bbcd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a22cba4730f53b3c3604ef4ea988dd.png)
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2024-04-24更新
|
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5卷引用:河南省郑州市中牟县第一高级中学2023-2024学年高一下学期5月月考数学试题
河南省郑州市中牟县第一高级中学2023-2024学年高一下学期5月月考数学试题河南省青铜鸣大联考2023-2024学年高一下学期4月期中考试数学试题河南省濮阳市普通高中2023-2024学年高一下学期4月期中考试数学试题(已下线)专题01 第六章 平面向量-期末考点大串讲(人教A版2019必修第二册)(已下线)专题01 平面向量(2)-期末考点大串讲(苏教版(2019))
名校
解题方法
9 . 如图,在
中,
是
的中点,
是线段
上靠近点
的四等分点,设
.
长为
长为
,求
的长;
(2)若
是
上一点,且
,试判断
三点是否共线?并说明你的理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211429ce394297f664f6b8e16edec714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa98090f1126d9e642cdaaeef34ccf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bc08b9379d5f64567b68c49e5eb8a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ee1ea509875a6ce53b37e5e25d0ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4817f6d025306bfcba653b4e8d4dc6.png)
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2024-04-23更新
|
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|
5卷引用:河南省洛阳市洛阳强基联盟2023-2024学年高一下学期3月联考数学试题
河南省洛阳市洛阳强基联盟2023-2024学年高一下学期3月联考数学试题河南省周口市鹿邑县第二高级中学校2023-2024学年高一下学期月考(一)(3月)数学试题河北省沧州市沧州十校2023-2024学年高一下学期3月月考数学试题(已下线)模块五 专题四 全真能力模拟2(高一期中模拟)(已下线)模块五 专题4 全真能力模拟2(北师版高一期中)
名校
解题方法
10 . 在
中,内角A,B,C所对的边分别为a,b,c,已知
,且
.
(1)求
面积的最大值;
(2)若
为边BC的中点,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e15cbd7c42d7b15d7ba8d2b28ab8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c51131473c33047e57d61e0cdb1c282.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0285cfd2a3daa7e8ddae081ecdfd12b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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2024-04-19更新
|
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3卷引用:河南省商丘市2023-2024学年高一下学期5月联考数学试题
河南省商丘市2023-2024学年高一下学期5月联考数学试题河南省南阳市六校2023-2024学年高一下学期4月期中考试数学试题(已下线)模块三 专题2 解答题分类练 专题5解三角形(解答题)【人教B版】