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如图,在平面直角坐标系xOy中,以Ox轴为始边作两个锐角α,β,它们的终边分别交单位圆于A,B两点.已知A,B两点的横坐标分别是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230927970823386/SYS201311012309279708233017_ST/0.png)
,
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.
(1)求tan(α+β)的值;
(2)求α+2β的值.
考点分析:
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