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已知tana=-,且tan(sina)>tan(cosa)则sina的值为( )...
已知tana=-
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,且tan(sina)>tan(cosa)则sina的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225157519090834/SYS201311012251575190908007_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225157519090834/SYS201311012251575190908007_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225157519090834/SYS201311012251575190908007_ST/3.png)
D.
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