解题方法
1 . 定义“辅助角函数”:
.
(1)若关于
,的方程
有解,则
的取值可以是______ (写出满足题意的一个
值即可)
(2)若
是
最小内角,则函数
的值域为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/517669409e6fe99179a3ba6fca0f8e66.png)
(1)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274dc78422bdeb61040bd37ef03b470f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b687dc330ee0af6c98b701599242e8.png)
您最近一年使用:0次
名校
2 . 一个创业青年租用一块边长为4百米的等边
田地
如图
养蜂、产蜜与售蜜,田地内拟修建笔直小路MN,AP,其中M,N分别为AC,BC的中点,点P在CN上,
规划在小路MN与AP的交点O(O与M、N不重合
处设立售蜜点,图中阴影部分为蜂巢区,空白部分为蜂源植物生长区,A,N为出入口
小路的宽度不计
为节约资金,小路MO段与OP段建便道,供蜂源植物培育之用,费用忽略不计
为车辆安全出入,小路AO段的建造费用为每百米5万元,小路ON段的建造费用为每百米4万元.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/98694fc9-f489-4a3b-abd1-12e689378d3a.png?resizew=156)
(Ⅰ)若拟修的小路AO段长为
百米,求小路ON段的建造费用;
(Ⅱ)设
, 求
的值,使得小路AO段与ON段的建造总费用最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a999fda5febcf29a602dc236e5f65de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/98694fc9-f489-4a3b-abd1-12e689378d3a.png?resizew=156)
(Ⅰ)若拟修的小路AO段长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11b53e957bf1f2cfb96b7e397988014.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc0017fd6d7f3786fbb150622b29a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84e37e0603a22ae0703d2a9a1d2643a.png)
您最近一年使用:0次
2019-03-28更新
|
749次组卷
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3卷引用:湖北省武汉外国语学校2022-2023学年高一下学期期中数学试题