1 . 已知函数
.
(Ⅰ)求函数
的最小正周期;
(Ⅱ)当
时,求函数
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b433c0b4d88524ad6b848a8488d9c895.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3202e14511fb886ef6f90699609c97af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
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2 . 设向量
,且
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24495c65e1260c0b276f520184988b54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.2 | B.![]() | C.8 | D.![]() |
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3 . 若
是单位向量,且
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35436a86597b198e7f36ecf807e8702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3cc938a40158a34f7912898546b976.png)
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