生物节律是描述体温、血压和其他易变的生物变化的每日生物模型.下表中给出了在24h期间人的体温的典型变化(从夜间零点开始计时).
(1)作出这些数据的散点图;
(2)选用一个三角函数来近似描述这些数据;
(3)在散点图中作出(2)中所选函数的图象.
时间 | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 |
温度 | 36.8 | 36.7 | 36.6 | 36.7 | 36.8 | 37.0 | 37.2 | 37.3 | 37.4 | 37.3 | 37.2 | 37.0 | 36.8 |
(2)选用一个三角函数来近似描述这些数据;
(3)在散点图中作出(2)中所选函数的图象.
21-22高一上·全国·课后作业 查看更多[1]
(已下线)5.7三角函数的应用(基础知识+基本题型)--【一堂好课】2021-2022学年高一数学上学期同步精品课堂(人教A版2019必修第一册)
更新时间:2022-03-11 08:40:28
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解答题-作图题
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【推荐1】已知函数
,直线
是其图象的一条对称轴.
![](https://img.xkw.com/dksih/QBM/2021/1/17/2637893106352128/2639037300940800/STEM/2ebd0c00-d07b-49df-9fb1-a3f363077821.png)
(1)求
的值;
(2)用五点作图法画出函数
在区间
上的图象,并由此写出函数在
上的单调减区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639d3986fac1a26ae1335205ae429f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60b49815c5c25b48e6c74d7077851a.png)
![](https://img.xkw.com/dksih/QBM/2021/1/17/2637893106352128/2639037300940800/STEM/2ebd0c00-d07b-49df-9fb1-a3f363077821.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)用五点作图法画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1613d377a07850c72cbec354b7a3000f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1613d377a07850c72cbec354b7a3000f.png)
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【推荐2】已知函数
的最大值为
,其图象相邻两条对称轴之间的距离为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648864814399488/2650033832591360/STEM/b6bc8f21-2805-423f-94b8-e53e2799ef5c.png)
(1)求函数
的解析式
(2)将
的图象向右平移
个长度单位,再向下平移
个长度单位,再将图象上所有点横坐标变为原来的一半,得到
的图象,用“五点法”作出
在
内的大致图象.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c364c3cd5399fd814a3b58f87e344600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648864814399488/2650033832591360/STEM/b6bc8f21-2805-423f-94b8-e53e2799ef5c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdaf49f9611922348aa2784465da614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9aeed3c8c5a04e48d011c607f9142.png)
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【推荐3】某同学在研究函数
的图象与性质时,采用“五点法”画简图列表如下:
(1)根据上表中数据,求出
及
的值;
(2)求函数
的单调递减区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89612ff74f6ffff6fd19161ce9388f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69b5b8c4c24eab782174c5cae1b88a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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【推荐1】函数
(
,
,
)的部分图象如图.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/11c847b5-9a69-44d1-a9df-bbe3bcbe8541.png?resizew=166)
(1)求函数
的解析式;
(2)将函数
上的每个点的纵坐标不变,横坐标变为原来的
倍,再将所得图象向右平移
个单位长度,得到函数
的图象.已知函数
若函数
的零点从左到右依次为
,
,…,
,求
的值,并求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68ae6678d22dc7b9125533b2c873b9e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e1734dcc7697235124fbaba4ba6033.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/11c847b5-9a69-44d1-a9df-bbe3bcbe8541.png?resizew=166)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b460177d1378e42a3d1cd647c6c00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b2023b8e0c5c980472ad874f1df676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21706e6143b6794a9c719daec196dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83ebbc345b194f2a9063d8e10e40672.png)
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【推荐2】如图是一弹簧振子做简谐振动的图像,横轴表示振动的时间,纵轴表示振子的位移.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/e28ae42e-9b5a-4a74-8d6b-eddb239eeec1.png?resizew=249)
求:(1)简谐振动的函数解析式;
(2)在时间为
时的位移.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/e28ae42e-9b5a-4a74-8d6b-eddb239eeec1.png?resizew=249)
求:(1)简谐振动的函数解析式;
(2)在时间为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d243a92682db31809d20689cf47043.png)
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【推荐1】已知函数
.
(1)求
的最小正周期和单调递增区间.
(2)当
时,求
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd00a9c3949dab1cd561985a8e0e1bd5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef762e35df78a7fa39f1282a15b7d7b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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【推荐2】设
,函数
(其中
)的最小正周期为
,且
.
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645046023225344/2645732233814016/STEM/9245d746-5165-4927-9f46-aa56f447b8f5.png)
(1)求
和
的值;
(2)在给定的坐标系中作出函数
在
上的图象;
(3)根据(2)的图象,写出
时,
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddebcb5cc7826c4a9acb9edb56617af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0049efb2e9afebf5098e24117c3bbb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f712d3994ae98fb5b302d50b255600.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645046023225344/2645732233814016/STEM/9245d746-5165-4927-9f46-aa56f447b8f5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)在给定的坐标系中作出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1613d377a07850c72cbec354b7a3000f.png)
(3)根据(2)的图象,写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64831d66b64c0125dbc386ffc7744fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解题方法
【推荐1】某商场经营某种商品,在某周内获纯利
(元)与该周每天销售这种商品数
之间的一组数据关系如表:
(1)画出散点图;
(2)求纯利
与每天销售件数
之间的回归直线方程;
(3)估计当每天销售的件数为
件时,每周内获得的纯利为多少?
参考数据:
,
,
,
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求纯利
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)估计当每天销售的件数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0205acc752ca24960e3cedde5852ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73dc80c3e0093c71bad26aca57567461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0062b1550edcf5f82ffca8e2547d824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043a8577d7b2a2ef907f494ac13a26d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b036c558c7065b093f40ff5089adc33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
![](https://img.xkw.com/dksih/QBM/2018/6/12/1965818194452480/1967330255364096/STEM/242c33c7-0d6a-4a2c-b1da-7169f268863e.png?resizew=211)
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解题方法
【推荐2】为推进北方地区冬季清洁取暖,国家发改委制定了煤改气、煤改电价格扶植新政策,从而使得煤改气、煤改电用户大幅度增加,下面条形图(图1)反映了某省2020年1~7月份煤改气、煤改电的用户数量(单位:万户).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/8058fe09-cefd-4ca2-aa0f-a704eebd57a9.png?resizew=446)
(1)在给定坐标系(图2)中作出煤改气、煤改电用户数量y随月份t变化的散点图,并用相关系数说明y与t之间具有线性相关性;
(2)建立y关于t的回归直线方程(系数精确到0.01),并预测11月份该省煤改气、煤改电的用户数量.
参考数据:
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/8058fe09-cefd-4ca2-aa0f-a704eebd57a9.png?resizew=446)
(1)在给定坐标系(图2)中作出煤改气、煤改电用户数量y随月份t变化的散点图,并用相关系数说明y与t之间具有线性相关性;
(2)建立y关于t的回归直线方程(系数精确到0.01),并预测11月份该省煤改气、煤改电的用户数量.
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37b1e43c1e852ac8b5bf8674d4148f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005d4636912011abe83422ede0d882bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e121ad53dec462d6b2771cac1e42ef04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2841789cfa495f9541acc77a26b786de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923557f74987174405af890c9a772c48.png)
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