解题方法
1 . 如图,A,B是⊙C上两点,若弦AB的长度为2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba370a3912d1a983146af9c7f9c950.png)
______ ,若向量
在向量
上的投影向量为
,则
与
的夹角为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba370a3912d1a983146af9c7f9c950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a88263738989b5bf9f9714024c3c2a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
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2 . 已知点
,
,
,
,则下列结论正确的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca979687ffb2214e747525635a6912c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49a31f8e8dba418bd5d886998ef8d17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42ef6839924ac157ca08d94fbd0b2a1.png)
A.当![]() ![]() |
B.当![]() |
C.当![]() ![]() |
D.当![]() ![]() ![]() ![]() |
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解题方法
3 .
是平面直角坐标系的原点,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049131856ba841523793ee3d83099014.png)
(1)求
在
上的投影数量;
(2)若向量
,满足:
与
互补,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9c730266ecf448c14608e24d37b986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d3bfa155ad67018da4d65815c5e5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9cb32a25c2a8bb99f75633b4cd5ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049131856ba841523793ee3d83099014.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3219b3539792a37a88cd74a60194494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22945ece4d423c9bdc243a46a7a89a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe6d51b27236dbd7f32f5e1ac86c9e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解题方法
4 . 下列论述中正确的是( )
A.已知平面向量![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.在四边形ABCD中,![]() ![]() ![]() |
D.在![]() ![]() ![]() |
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河南省濮阳市第一高级中学2022-2023学年高一下学期5月月考数学试题辽宁省大连市第二十四中学2021-2022学年高一下学期期中考试数学试题(已下线)6.4.1-6.4.2 平面几何中的向量方法、向量在物理中的应用举例2-2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(人教A版2019必修第二册)
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解题方法
5 . 在
中,内角A,B,C的对边分别为a,b,c,点O是
的外心,
.
(1)求角A;
(2)若
外接圆的周长为
,求
周长的取值范围,
![](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/1ac6babcae1fef212f9376b6ad226fba.png)
(1)求角A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa2eb9837d18069575f16397d175a6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
6 . 在等腰梯形ABCD中,
,
,点P为BC中点,点Q是边AB上一个动点,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641aa755ada1d83daafc82d5f1fa88db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97b5a5f3853f0ac8712decba0c0a4.png)
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7 . 下列说法正确的是( )
A.已知平面上的任意两个向量![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若非零向量![]() ![]() ![]() ![]() ![]() ![]() |
D.已知平面向量![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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8 . 在
中,已知
,若
,且
,则
在
上的投影向量为
(
为与
同向的单位向量),则
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4dbcd3ad58aff0f5d43e0643991e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bca4c0ab83a3ca3b0ebf03281be74f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870d6e22a589b97dda6c37a293624a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dfd6073fcb3555ababf73b39a97e1bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc64abe49847ade9b78678ba1f8e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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9 .
中,
,
,点
为
外接圆的圆心.且
,则
的面积为( )
![](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/e899c486dc49e560fc4aca05e16835b7.png)
![](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/320f095a64c51ea5fa066477e295c1a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
10 . 设向量
,
,
.
(1)当
时,以
为基底表示
;
(2)若
的夹角为锐角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea4d351bf083e6073f12845425fe6f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b1d05cac99e0e0ef08674191ce216b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911a64deb2ac610642951f7fe67584e3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1625e24072a8fe6c277ecfca2c62cdaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20ec3efaa6b6ff5769e8999df5714a9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d30cce70458cc9d72cb41c5f3a4f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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