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已知过点(0,1)的直线l:xtanα-y-3tanβ=0的斜率为2,则tan(...
已知过点(0,1)的直线l:xtanα-y-3tanβ=0的斜率为2,则tan(α+β)=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124224241173266/SYS201310251242242411732004_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124224241173266/SYS201310251242242411732004_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124224241173266/SYS201310251242242411732004_ST/2.png)
D.1
考点分析:
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