已知钝角
满足
,
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a5e062c916d25381775c65700ca7bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecab26dbaa31e244d69b6a01cabb83a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5219302e605abe138331ae55e20ff158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800db22e042a298041eda8b0c72abb7c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2016高一·全国·课后作业 查看更多[2]
更新时间:2017-11-27 15:29:15
|
相似题推荐
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知
,
,且满足
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339f75022dc73b3b556f2c48cacf76b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63efb1e4d56082ab77f68f83e7e0ad1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0356f346cb717cdba18538fb7d6ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2810bbab80c7b3c105cc5bfc3cadaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9da6f152a33ef475161c9e396647225.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5caabda288fc01cc168938846eec5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e06239fce96cbd3f5dd33776fbb6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17259c423fead1507ce60353614c951.png)
A.![]() | B.![]() | C.![]() | D.13 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐3】已知
,
,且
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf833851109223471445759951c499d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41bc900e7231334a8c6a38b19b9b1405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
A.![]() | B.![]() |
C.![]() | D.若![]() ![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知顶点在原点,始边在
轴非负半轴的锐角
绕原点逆时针转
后,终边交单位圆于
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/975fa22ab1f0ccca005abea9d62bc18d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】我国人脸识别技术处于世界领先地位.所谓人脸识别,就是利用计算机检测样本之间的相似度,余弦距离是检测相似度的常用方法.假设二维空间中有两个点
,
,O为坐标原点,余弦相似度为向量
,
夹角的余弦值,记作
,余弦距离为
.已知
,
,
,若P,Q的余弦距离为
,
,则Q,R的余弦距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1df320d266e857a428ff0bac1eb680bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2376fa0549e6fae46bae54d6ace942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926778fe15991308849cdba1822595a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1b00c13a8bb6db096dd866a2c37dee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b20bb38fbd8ff8e5f8e985a0babf498d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb68696d2da8cc8a32011148b831de4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c50a0367a96faa9a98569102161ace3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2232ad4bbf5dafd3a10104fba6855ac6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】已知函数
满足
,若
,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4027dc3115854454b27f8e9978f2ceab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0454de19ae83e3ae437b6868f04f1c50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf19ebcf690f8e90af90b2244a04be9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d904fc4f0ffee16370fb4c37246232c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b56d305e9a786ae5dd9df8d9e41c8f8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次