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在△ABC中,∠C=90°,AB=2,AC=1,则sinB的值是( ) A. B...
在△ABC中,∠C=90°,AB=2,AC=1,则sinB的值是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192605837686398/SYS201311011926058376863012_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192605837686398/SYS201311011926058376863012_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192605837686398/SYS201311011926058376863012_ST/2.png)
D.2
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192605837686398/SYS201311011926058376863008_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192605837686398/SYS201311011926058376863008_ST/1.png)
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