函数
的图象如下图所示,则
的表达式是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba99a5c5661eedaef4b36ade1a7c5c5.png)
________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b668569a678cab5a570e9f0f525d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba99a5c5661eedaef4b36ade1a7c5c5.png)
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570549967052800/1570549972426752/STEM/50da9621-7c6d-48f6-9353-21590b8c47f7.png?resizew=145)
11-12高三上·北京·开学考试 查看更多[1]
(已下线)2012届北京市北师大附中高三上学期开学测试理科数学试卷
更新时间:2016-12-01 08:35:00
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【知识点】 由图象确定正(余)弦型函数解析式解读
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