名校
1 . 在
中,下列命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() |
B.![]() |
C.点O为![]() ![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2022-03-25更新
|
400次组卷
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4卷引用:江苏省连云港市灌南高级中学2022-2023学年高一下学期期中数学试题
20-21高一·全国·课后作业
名校
2 . 如图,在
中,
,
,
.求:
的值;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b89e7ff008dea7530bdc4ea5b6419d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cb63aeea0b37799404c8fec092b21d.png)
您最近一年使用:0次
2021-11-12更新
|
558次组卷
|
4卷引用:江苏省连云港高级中学2023-2024学年高一下学期期中考试数学试卷
名校
3 . 已知向量
与
的夹角为30°,且
,
,则
等于
![](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/70e310702748855c3edccd151aae0143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300904a3fab65fd647b219c3b153db1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e225297418ba60d303578d96116f2e22.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-08-20更新
|
1173次组卷
|
3卷引用:江苏省连云港高级中学2021-2022学年高一下学期期末模拟数学试题
20-21高一·全国·课后作业
名校
4 . 已知
,
,
,
的夹角为120°,求:
(1)
的值;
(2)
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd18461fd9d77e6fa46a654f0ab540f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03ef3e7fb905b47f36c4630fcc65dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4bd9b8cc54822fbea2ac8d72a3ec2c1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208683a5ffda4cbc3ecfb41a4b0863ee.png)
您最近一年使用:0次
2021-11-11更新
|
479次组卷
|
3卷引用:江苏省东海高级中学2023-2024学年高一下学期第一次检测数学试题
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5 . 已知
的面积为3,在
所在的平面内有两点
,满足
,
,记
的面积为
,则下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd1cf8b1d49fe101d3dc0a25ce71ad7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3fd9217f26f1a7506a847edcfd53ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
A.![]() ![]() ![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
6 . 已知
的内角A,B,C所对的边分别为a,b,c,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若对任意![]() ![]() ![]() |
您最近一年使用:0次
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7 . 如图,在
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/1008981c-3828-4d8a-a5aa-f1fee4c0c41d.png?resizew=171)
(1)试用
和
表示
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7502eee6f33e8c940dec63ab6473c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce08a747949a55bd5d36f007e315f0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5003770c8745c903214ef32c838294.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/1008981c-3828-4d8a-a5aa-f1fee4c0c41d.png?resizew=171)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe35c91649a5bea2518387a2b36e0c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436b63e793d6d39990341d29cf47f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041b02bedb8c70bffccaa4b563312590.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a23bad676875fbe3d8c38d5aa6a1a04.png)
您最近一年使用:0次
2019-12-27更新
|
727次组卷
|
4卷引用:江苏省连云港市2018-2019学年高一上学期期末数学试题
名校
解题方法
8 . 已知单位向量
,
的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5a94a5c3accad33154c39cbd310df4.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/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5a94a5c3accad33154c39cbd310df4.png)
您最近一年使用:0次
解题方法
9 . 在边长为3的等边△ABC中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d851c1570a352235580fec08f5e5e921.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e393389fcb8c45db6df53c77f4589f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d851c1570a352235580fec08f5e5e921.png)
您最近一年使用:0次
解题方法
10 . 在
中,已知
,
,
.若点C,D满足
,
,则
的值为_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb8015df9744ca1df1f736a1ce20b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac51bffb8f476896081027b33f7ec25d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6439c3b7c6478ab4b38c1a3cc4fab78f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8b3bfe55563508597d7b6523e2dba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c63b16341b3323fd34156b45f17d93.png)
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2020-06-25更新
|
344次组卷
|
2卷引用:江苏省连云港市赣榆区智贤中学2020届高三下学期高考适应性考试数学试题