名校
1 . 已知向量
与
的夹角
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1d203b1c0363e93993d916ce0a5a20.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32fcd19a530192f449725520e6a8d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1d203b1c0363e93993d916ce0a5a20.png)
您最近一年使用:0次
名校
2 . 已知
的内角A的大小为
,面积为
.
(1)若
,求
的另外两条边长;
(2)设O为
的外心,当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f8e6b5ba877fa40b87d67d9bba65bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39289d3709ba1e565b165c30ed981d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(2)设O为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3f00496643c3411f7f21d161830b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1b8a9c780e2c93fb63940b48399363.png)
您最近一年使用:0次
2019-09-18更新
|
332次组卷
|
2卷引用:江苏省天一中学2018-2019学年高二(强化班)下学期期末考试数学试题
名校
解题方法
3 .
的三边长是2,3,4,其外心为O,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda2a5bfd18e8c56c2092394c7ebbb30.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda2a5bfd18e8c56c2092394c7ebbb30.png)
您最近一年使用:0次
2020-09-20更新
|
224次组卷
|
2卷引用:江苏省无锡市宜兴中学2020-2021学年高二上学期强基培训数学试题
解题方法
4 . 在
中,
是
的中点,
是
上一点,且
,则
的值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ff9d4fdd0d176042505b7aac016852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7256e0884829bd5f0628fd50d7693132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fcb360984721a5600d426949ccdb14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f1796428c2600bbbdff746b0311583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd0f5f02a94b04a0659aee52be4bbdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8981fbec98389ff130da875c5046618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02f5a9fe84e87ba1080438064a69a7a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-03-22更新
|
579次组卷
|
3卷引用:江苏省无锡市大桥高中2020-2021学年高三上学期10月检测数学试题
5 . 如图,设
,
是平面内相交成
角的两数轴,
,
分别与
轴,
轴正方向同向的单位向量,若向量
,则把有序数对
叫做向量
在坐标系
中的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/1ffbaba4-43f1-4b1d-9720-bb5f03076f2d.png?resizew=152)
(1)设
,
,求
的值;
(2)若
,计算
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14069d21d32c724f0ebe3e311f114c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8315ec34019d719771152be2252106e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0725eb3ba34ec2631d77a36385628059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82973c2b6d1c407318545f1c0f32ec2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/1ffbaba4-43f1-4b1d-9720-bb5f03076f2d.png?resizew=152)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25e326fdf9e5456f48e8a99a069f379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f36374ce95a4945d0e58264c2b271f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fdffaca7c78d569cfeebb80bfc26329.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36a989cef1bbeb220bcdbfbcc2dda9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e87b143b8e89334dda69da4671fbf8e.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,平面向量
,
的夹角为
,任意点R关于点B的对称点为S,点S关于点C的对称点为T,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32a069141498c91ac49fb8ca75a99d9.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/9a597ad09fe2d6a0a7cccabfd2e66b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32a069141498c91ac49fb8ca75a99d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/cb767519-4808-49e1-ad73-938bfa2b90d7.png?resizew=130)
您最近一年使用:0次
名校
7 . 已知
,向量
与
的夹角为
,向量
,
.若
,则实数
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc73c1ebb703d194cb4c15ab5425faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f8d9f2f93c672433a19935ff65b601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9175c69bb8f058e5d9163da6c55e66b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98015f746340e24cde6bf0ab437a320e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解题方法
8 . 已知向量
满足
,则
与
的夹角为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a838d9d01d18ed8cfb34d302cd74c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a1a014ed6aa44c3b63e91226a83435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
9 . 已知菱形
的边长为
,
,点
分别在边
上,
.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26eba7e649fade39fd2d0b6ef4ac5ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514e17265d4ca55292afc778c1af5f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33215209372668f6df919aac08a470f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b6eb84dbf1014fc2fd6f8685f71ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
您最近一年使用:0次
2016-12-03更新
|
755次组卷
|
3卷引用:2015届江苏省无锡市高三上学期期末考试理科数学试卷
名校
10 . 如图,
是边长为2的正三角形,以A为直角顶点向外作一等腰直角
,记
,
,则m,n中较大数的数值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2604b4b776f773917fcb2355cfdeff1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b095c6bf05d67db2f4da445b0ae6904.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/023e1241-c84d-4b8a-abaa-efafe217ecfc.png?resizew=124)
您最近一年使用:0次