如图,△ABC的顶点都在边长相等的小正方形的顶点上,则sin∠BAC等于( )
![](https://img.xkw.com/dksih/QBM/2022/3/21/2940944828620800/2957454274576384/STEM/83c99202-febb-4cf3-8eb7-895146babe64.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2022/3/21/2940944828620800/2957454274576384/STEM/83c99202-febb-4cf3-8eb7-895146babe64.png?resizew=140)
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更新时间:2022-04-13 20:19:02
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【推荐1】如图,
、
、
是小正方形的顶点,且每个小正方形的边长为1,则
的值为( )
![](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/c3d08f0ab6e573253450e03427e13db1.png)
A.![]() | B.![]() | C.![]() | D.2 |
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【推荐2】如图所示的网格是正方形网格,则sinA的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/31ae6e73-245f-4dba-bcb3-e404ca8a04ed.png?resizew=152)
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【推荐1】如图,
的顶点分别在单位长度为1的正方形网格的格点上,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/14e02807-9eb1-422b-a86c-7ffcabd04575.png?resizew=125)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bfa1419145fb9c7249b3dc1819d3e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/14e02807-9eb1-422b-a86c-7ffcabd04575.png?resizew=125)
A.![]() | B.![]() | C.![]() | D.![]() |
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适中
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【推荐2】在正方形网格中,每个小正方形的边长都是1,∠BAC的位置如图所示,则sin∠BAC的值为( )
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881402939695104/2882825001451520/STEM/14cd713b-647d-4f08-99e8-3d65a2965a11.png?resizew=208)
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881402939695104/2882825001451520/STEM/14cd713b-647d-4f08-99e8-3d65a2965a11.png?resizew=208)
A.![]() | B.![]() | C.![]() | D.![]() |
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