下列计算正确的有________________________ .
①
;②
;
③
; ④
.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8562c26311fbb79972bc25a095b39f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92365b8ad476b485827855b4ea6558f1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35783e43f86ae396ffc8badcfdfc4cef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a934563b5b65df94b356b350cea8cbd.png)
19-20高一·全国·课后作业 查看更多[1]
(已下线)[新教材精创] 5.5.1角和与差的正弦、余弦和正切公式练习(1) -人教A版高中数学必修第一册
更新时间:2020-08-23 15:37:27
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