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1 . 在
中,角A,B,C的对边分别为a,b,c,则下列结论成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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解题方法
2 . 已知
,
,
,设
是直线
上的一点(其中
为原点).
(1)若
,
,求点
坐标;
(2)求
取最小值时向量
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8adaf18dde70b8cf60785c3a0fac58c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a0e84ad7fec5535fc30d90d780467a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39efcef3984d5c528df9ed16b191762b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fc2a215a63f1846cdc94cc0260d4ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e87088da41685cc8d433fbbe0e18d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6da9ea780ba5e54f3be57b4a7bb12b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
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3 . 下列说法不正确的有( )
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() ![]() |
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4 . 已知向量
,
,且
,则向量
,
的夹角是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ae0d7b3266f32b6a916b6237b6b838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf342e77c56e55a35bb1151bc215a3a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce54aebe5e511d7a31ccab581d993d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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2023-09-07更新
|
206次组卷
|
2卷引用:湖南省益阳市安化县第二中学2022-2023学年高一下学期4月月考数学试题
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5 . 下列说法中,正确的是( )
A.棱柱中每一个面都不会是三角形 |
B.各个侧面都是正方形的四棱柱不一定是正方体 |
C.经过圆锥的两条母线的截面一定是一个等腰三角形 |
D.用斜二测画法作水平放置的平面图形的直观图时,菱形的直观图还是菱形 |
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6 . 在
中内角
,
,
所对边的长分别为
,
,
,已知
,
,
.
(1)求
;
(2)求
.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783d6adfa8fb1352679c5185258d842a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
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解题方法
7 . 设复数
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e0aeeb125cfb42e33094594d4381f5.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa3b6a922ae6812649ba269bea296c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e0aeeb125cfb42e33094594d4381f5.png)
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2023-09-07更新
|
309次组卷
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4卷引用:湖南省益阳市安化县第二中学2022-2023学年高一下学期4月月考数学试题
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解题方法
8 . 在复平面上,复数
的共轭复数
对应的向量
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8884cdeccf84818a97a0612f924e3410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fcfebd9f5a57036e6df6b6e14865da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-08-28更新
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378次组卷
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2卷引用:湖南省益阳市南县第一中学2023-2024学年高三8月月考数学试题
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9 . 已知函数
,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996c4b2a95d9dc663a99523b00f7eff0.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.当![]() ![]() |
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2023-08-08更新
|
842次组卷
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4卷引用:湖南省益阳市南县第一中学2023-2024学年高三8月月考数学试题
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10 . 在
中,
为
边上的点,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/c601830648e246966849248ba0a9eb0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9769839f35c2b7002b9f5e62f40b34de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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