如图,在平面直角坐标系xOy中,已知点A(2,1)和点B(3,0),则sin∠AOB的值等于( )
![](https://img.xkw.com/dksih/QBM/2018/1/4/1852704615374848/1856510637760512/STEM/91f3d24032de4f959b1fde5b40866293.png?resizew=125)
![](https://img.xkw.com/dksih/QBM/2018/1/4/1852704615374848/1856510637760512/STEM/91f3d24032de4f959b1fde5b40866293.png?resizew=125)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2018-01-09 09:03:28
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【推荐1】直角三角形中两边的比是
,则较短边所对的角的正弦值是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
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