已知函数
,
,
的图象的3个交点可以构成一个等腰直角三角形,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1121bdb9b01935d5f878209fd150bd0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5eac15eabeaefd981d56c137a3eeea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-03-09 09:08:06
|
【知识点】 正、余弦型三角函数图象的应用解读
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解题方法
【推荐1】已知函数
在某个周期的图象如图所示,A,B分别是
图象的最高点与最低点,C是
图象与x轴的交点,则
( )
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946770221383680/2947579343298560/STEM/e04bb31085da4c4fb5bde2dd10a7cadc.png?resizew=193)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8199126adaae2a058bae95b244ef8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c6b242096be9b5f75daf95be75c232.png)
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946770221383680/2947579343298560/STEM/e04bb31085da4c4fb5bde2dd10a7cadc.png?resizew=193)
A.![]() | B.![]() | C.![]() | D.![]() |
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适中
(0.65)
名校
【推荐2】已知函数
(
)的图象关于直线
对称且
,如果存在实数
,使得对任意的
都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e78eb975561db2b9446f8f49b197296.png)
,则
的最小值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55838863eacaec3c4f56df61169488d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cb168e7769384bfac3c996080d07c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d683632916f660cbd1d5b036f0ebf695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e78eb975561db2b9446f8f49b197296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f783a0cb7e0528a2a3577f14782bfe4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.2 | B.4 | C.6 | D.8 |
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