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解题方法
1 . 如图所示,某市政府计划在该扇形地域内建设图书馆,为了充分利用这块土地,并考虑与周边环境协调,要求该图书馆底面矩形
的四个顶点都落在边界上.经过测量,扇形的半径为
,
,
.记弧
的中点为G,连接
,分别与
,
交于点M,N,连接
,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/57c550c6-2941-4faa-beaf-33c1c82254e2.png?resizew=165)
(1)求矩形
的面积关于
的函数
;
(2)求矩形
的最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8badcdb1e5621f0ac4d9272041185a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554d5d0e557fe3c4162046d40c90324b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/57c550c6-2941-4faa-beaf-33c1c82254e2.png?resizew=165)
(1)求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd7229922fbb3ce09dada883f74fbb1.png)
(2)求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
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