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在正方形网格中,△ABC的位置如图所示,则cosB的值为( ) A. B. C....
在正方形网格中,△ABC的位置如图所示,则cosB的值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000328794271376/SYS201311030003287942713003_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000328794271376/SYS201311030003287942713003_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000328794271376/SYS201311030003287942713003_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000328794271376/SYS201311030003287942713003_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000328794271376/SYS201311030003287942713003_ST/3.png)
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(x-5)
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000328794153555/SYS201311030003287941535023_ST/0.png)
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≈2.24)
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