关于以下结论:
①
,
;
②函数
的最小正周期为
;
③若向量
,则向量
;
④
.
以上结论正确的个数为______ .
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac657ea5bbf4b237a30e4074c76cc81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f9fdc01e564d4c2e5f7d3c8d0f3db3.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec95a180f925a142e2dc39808a483603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
③若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026015d4806054775ce5b31d8cf0f661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc568514724e43ba2fa10ad5a591e0.png)
以上结论正确的个数为
更新时间:2020-01-06 20:57:26
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