如图,
中,
,
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2022/12/28/3140511771181056/3143585517682688/STEM/cf80188ac0984312837cf2e11c335f2d.png?resizew=234)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e87351a853d0cc094786dd856e0fb22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e563e032dfdef69b0f357060c27bd4.png)
![](https://img.xkw.com/dksih/QBM/2022/12/28/3140511771181056/3143585517682688/STEM/cf80188ac0984312837cf2e11c335f2d.png?resizew=234)
A.![]() | B.3 | C.![]() | D.![]() |
22-23九年级上·辽宁大连·期末 查看更多[2]
辽宁省大连市甘井子区第七下六中学2022-2023学年九年级上学期期末数学试题(已下线)第1课时 锐角三角函数-2022-2023学年九年级数学下册同步考点知识清单+例题讲解+课后练习(人教版)
更新时间:2023-01-01 19:44:01
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【知识点】 求角的余弦值
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单选题
|
较易
(0.85)
名校
【推荐1】点P的坐标为
,A是x轴正半轴上一点,O为原点,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad5a5fb5d195dca0f620035cdd8a996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e210209aa6addd28fa50e4dbdbe874.png)
A.3 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】如图,在正方形网格中,每个小正方形的边长都是1,
是
的外接圆,点A,B,O在网格线的交点上,则
的值是( )
![](https://img.xkw.com/dksih/QBM/2022/1/4/2894127720718336/2951529335414784/STEM/c1c66faa-592f-4d00-9865-8d2b0f441ba4.png?resizew=142)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92daabae2aada36f619b9ae78aefe3e6.png)
![](https://img.xkw.com/dksih/QBM/2022/1/4/2894127720718336/2951529335414784/STEM/c1c66faa-592f-4d00-9865-8d2b0f441ba4.png?resizew=142)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次