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(2009•淄博)在等腰直角三角形ABC中,∠C=90°,则sinA等于( ) ...
(2009•淄博)在等腰直角三角形ABC中,∠C=90°,则sinA等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230900326869811/SYS201310212309003268698002_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230900326869811/SYS201310212309003268698002_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230900326869811/SYS201310212309003268698002_ST/2.png)
D.1
考点分析:
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