(1)计算:
+(π-3)0-
-cos60°+tan30°
(2)已知x是一元二次方程![](https://img.xkw.com/dksih/QBM/2013/6/3/1573660661686272/1573660666994688/STEM/b6a8811eafe746a786edfcdd516c6130.png)
的实数根,求代数式:
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360055c67f42895fb5485b36e7dbf581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5be7821872c2f83d39ffaea5216d09.png)
(2)已知x是一元二次方程
![](https://img.xkw.com/dksih/QBM/2013/6/3/1573660661686272/1573660666994688/STEM/b6a8811eafe746a786edfcdd516c6130.png)
![](https://img.xkw.com/dksih/QBM/2013/6/3/1573660661686272/1573660666994688/STEM/4645f56b65474a33a9d184edb555ffaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217ee153faecd8fee126ccc441e8b90e.png)
更新时间:2016-12-05 18:03:44
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【知识点】 特殊角三角函数值的混合运算解读