(2006•遂宁)计算:(-2)
2+(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110301275194719/SYS201310191103012751947015_ST/0.png)
-1)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110301275194719/SYS201310191103012751947015_ST/1.png)
tan60°.
考点分析:
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