已知三角式:①
;②
;③
;④
.当
时,与
恒等的是__________ .(选填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b84bd57dbbb29193818f8ade844db43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f129b537a0fd9a883a3a43344e1bec65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/befdbf5a1dfb4f0ef10e1e044b139f54.png)
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20-21高一下·上海·课后作业 查看更多[3]
沪教版(2020) 必修第二册 同步跟踪练习 第6章 三角 6.2 阶段综合训练(2)(已下线)5.5.2 简单的三角恒等变换-2021-2022学年高一数学考点讲解练(人教A版2019必修第一册)沪教版(2020) 必修第二册 同步跟踪练习 第6章 6.2阶段综合训练(2)
更新时间:2021-03-25 13:40:12
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