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在△ABC中,∠C=90°,AB=13,BC=12,则sinB的值为( ) A....
在△ABC中,∠C=90°,AB=13,BC=12,则sinB的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101402570766219/SYS201311031014025707662003_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101402570766219/SYS201311031014025707662003_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101402570766219/SYS201311031014025707662003_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101402570766219/SYS201311031014025707662003_ST/3.png)
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c,则sinB的值是( )
A.
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如图,在直角△ABC中,∠C=90°,若AB=5,AC=4,则sinB=( )
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B.
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B.
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B.2
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