计算:(﹣2)﹣2+
cos60°﹣(
﹣2)0;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
更新时间:2019-03-29 22:31:22
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【知识点】 特殊角三角函数值的混合运算解读