1 . 如图,已知
是半径为1,圆心角为
的扇形,
是扇形弧上的动点,
是扇形的内接矩形,记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09371ae56cb242bcee480f7f2e441ac8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/10396de6-2c43-46ed-aa9a-d56132b2b0a2.png?resizew=183)
(1)请用
来表示矩形
的面积.
(2)若
,求当角
取何值时,矩形
的面积最大?并求出这个最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6c71a0da6a878a5b12bf8a8e784645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8181ea36422c0cb0bfe88b5a5ae01713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09371ae56cb242bcee480f7f2e441ac8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/10396de6-2c43-46ed-aa9a-d56132b2b0a2.png?resizew=183)
(1)请用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb0efbaf7efa7832d362e47fe841227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1f08c7640e62e8717abf4d44a6c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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2 . 如图,在海岸线l一侧P处有一个美丽的小岛,某旅游公司为方便登岛游客,在l上设立了M,N两个报名接待点,P,M,N三点满足任意两点间的距离为
公司拟按以下思路运作:先将M,N两处游客分别乘车集中到MN之间的中转点Q处
点Q异于M,N两点
,然后乘同一艘游轮由Q处前往P岛
据统计,每批游客报名接待点M处需发车2辆,N处需发车4辆,每辆汽车的运费为20元
,游轮的运费为120元
设
,每批游客从各自报名点到P岛所需的运输总成本为T元.
![](https://img.xkw.com/dksih/QBM/2018/12/7/2091540751695872/2093929368592384/STEM/3eea160e7dcd49ee99e9070da5457b72.png?resizew=267)
写出T关于
的函数表达式,并指出
的取值范围;
问:中转点Q距离M处多远时,T最小?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c797237fd1a5853a981c1f6db6c2db.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/934f13f77bcff1ae64578db7b0706359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c487acc308529ae1884a5d172d55d5c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbdcaf674374f56d68f1294d14641fc.png)
![](https://img.xkw.com/dksih/QBM/2018/12/7/2091540751695872/2093929368592384/STEM/3eea160e7dcd49ee99e9070da5457b72.png?resizew=267)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
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3 . 如图,在矩形纸片
中,
,
,在线段
上取一点
,沿着过
点的直线将矩形右下角折起,使得右下角顶点
恰好落在矩形的左边
边上.设折痕所在直线与
交于
点,记折痕
的长度为
,翻折角
为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/b3169b57-236c-4e48-be43-5cec73510d5c.png?resizew=101)
(1)探求
与
的函数关系,推导出用
表示
的函数表达式;
(2)设
的长为
,求
的取值范围;
(3)确定点
在何处时,翻折后重叠部分的图形面积最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cf997be91eba5aa57c308a3461c799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4947cf6f252a84f76ec6d2ee6e1b834e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269546b987b40edb492e4ca4d5eee4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/b3169b57-236c-4e48-be43-5cec73510d5c.png?resizew=101)
(1)探求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19f6c71e82001bb106b6f1389046b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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4 . 为测量一烟囱高度,在地面上选一直线上的三点
.已知
,在
三点测出烟囱顶部的仰角分别为45°,60°,60°.若
三个测量点的高度均为
,求烟囱的高度.(精确到
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa365070fbfda5f475e456cf7b83713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6244c4be2c661dc2166885d65bbad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaa19eeaf415ed419e77fe92794f443.png)
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2021高二·江苏·专题练习
5 . 某城市街道路宽OD为
米,现准备在道路的边缘安装高度为11米
即
的路灯,设计灯杆AB与灯柱OA成
角,并要求当灯罩轴线BC与灯杆AB垂直时,灯罩轴线正好通过OD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/39885a0a-6bbf-4e63-a28f-1955f1f7c3d4.png?resizew=212)
(1)求灯杆AB的长为多少米;
(2)路灯采用可旋转灯口方向的锥形灯罩,灯罩轴线BC与灯的边缘光线
如图BM,
都成
角,设
,是否存在
,能使路灯的光线照亮整个路面?若存在,求
的取值范围;若不存在,在M, N都落在路面OD上的条件下,求MN的最大值和最小值
参考数值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530c9823ad0524d9f2bd11788b9e7439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7172401bdff68dea264987e544040230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84288b493b64c3a30466fb9075621da4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/39885a0a-6bbf-4e63-a28f-1955f1f7c3d4.png?resizew=212)
(1)求灯杆AB的长为多少米;
(2)路灯采用可旋转灯口方向的锥形灯罩,灯罩轴线BC与灯的边缘光线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83052844138db15134f321ba72379f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c030b25575d683af91c06e6a3e4f463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcf3b74c1fad3267028860eea4858a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a03f349b5ca660c22fb892679a1013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a90d8308cde323d53bd3d9a22b0bd3.png)
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名校
6 . 几千年的沧桑沉淀,凝练了西樵山的美,清幽秀丽的自然风光,文化底蕴厚重的旅游,古朴自然的民俗风情.自明清以来,文人雅士,群贤毕至,旅人游子,纷至沓来,使秀美的西樵山成为名嗓南粤的旅游热点.如图,游客从某旅游景区的景点
处下山至
处有两种路径,一种是从
沿直线步行到
,另一种是先从
乘景区观光车到
,然后从
沿直线步行到
.现有甲、乙两位游客从
处下山,甲沿
匀速步行,速度为50米/分钟,在甲出发2分钟后,乙从
乘观光车到
,在
处停留20分钟后,再从
匀速步行到
.假设观光车匀速直线运行的速度为250米/分钟,山路
长为2340米,经测量,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/48236c39-dff2-43d0-868b-ebb3222b9263.png?resizew=179)
(1)求观光车路线
的长;
(2)问乙出发多少分钟后,乙在观光车上与甲的距离最短?
(3)为使两位游客在
处互相等待的时间不超过3分钟,乙步行的速度应控制在什么范围内?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d54878886657b672c4bcd2bc746553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a67c529d3e81a79c4e4409953d316f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/48236c39-dff2-43d0-868b-ebb3222b9263.png?resizew=179)
(1)求观光车路线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)问乙出发多少分钟后,乙在观光车上与甲的距离最短?
(3)为使两位游客在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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名校
7 . 为了培养学生的数学建模和应用能力,某校组织了一次实地测量活动,如图,假设待测量的树木
的高度
,垂直放置的标杆
的高度
,仰角
三点共线),试根据上述测量方案,回答如下问题:
(1)若测得
,试求
的值;
(2)经过分析若干测得的数据后,大家一致认为适当调整标杆到树木的距离
(单位:)使
与
之差较大时,可以提高测量的精确度,.若树木的实际高为
,试问
为多少时,
最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5922f9b5406a4857744c30348740a4b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7cd83e17de55b813146ec1b2dcd730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d93280f0604007ef539d392325f3c5e.png)
(1)若测得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fa7198aafc8901ae5022651da12dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(2)经过分析若干测得的数据后,大家一致认为适当调整标杆到树木的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c59b14235ee9b4651047e7d57f65955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f70dacf39de75e7a9f7081f646013a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/0914541a-1eaa-481d-9519-bb64def71b1a.png?resizew=207)
您最近一年使用:0次
2018-11-18更新
|
591次组卷
|
3卷引用:【全国百强校】福建省厦门外国语学校2018-2019学年高二上学期期中考试数学(文)试题
8 . 如图,单位圆
与
轴正半轴相交于点
,圆
上的动点
从点
出发沿逆时针旋转一周回到点
,设
(
),
的面积为
(当
三点共线时,
),
与
的函数关系如图所示的程序框图.
(1)写出程序框图中①②处的函数关系式;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/2e3a4b66-baeb-496b-ae68-a40ed1d108a6.png?resizew=338)
(2)若输出的
值为
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5e9f2a3b112471417b8de2cbb36823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25424690055eb5e049d523804bbd9614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45b8b000c9c286bff8a480dbf03b513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2665479c5fb12e1e728716a30a219c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)写出程序框图中①②处的函数关系式;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/2e3a4b66-baeb-496b-ae68-a40ed1d108a6.png?resizew=338)
(2)若输出的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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名校
解题方法
9 . 如图,某污水处理厂要在一个矩形
的池底水平铺设污水净化管道(直角
,E是直角顶点)来处理污水,管道越长,污水净化的效果越好.设计要求管道的接口E是
的中点,F,G分别落在
,
上,且
,
,设
.
![](https://img.xkw.com/dksih/QBM/2020/2/10/2396177401389056/2396570188849152/STEM/cbada9268da344c69f0b4abf6bfa7acc.png?resizew=152)
(1)当
为何值时,
的面积S最小,并求出最小值;
(2)试将污水管道的长度
表示成
的函数,并写出定义域;
(3)当
为何值时,污水净化的效果最好,并求此时管道
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9756177ef0c7c685e0fc62077a1cd4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5eb3baad4f5d8ad3bbe0d95c23e3dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8f4f1a997d0a2cbd4bff0bf4856dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d45484f1225c59b76f2cc21207ad5c2.png)
![](https://img.xkw.com/dksih/QBM/2020/2/10/2396177401389056/2396570188849152/STEM/cbada9268da344c69f0b4abf6bfa7acc.png?resizew=152)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9756177ef0c7c685e0fc62077a1cd4e.png)
(2)试将污水管道的长度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2018高一下·全国·专题练习
名校
10 . 如图是一个缆车示意图,该缆车的半径为4.8 m,圆上最低点与地面的距离为0.8 m,缆车每60 s转动一圈,图中OA与地面垂直,以OA为始边,逆时针转动θ角到OB,设B点与地面的距离为h m.
(1)求h与θ之间的函数解析式;
(2)设从OA开始转动,经过t s达到OB,求h与t之间的函数解析式,并计算经过45 s后缆车距离地面的高度.
(1)求h与θ之间的函数解析式;
(2)设从OA开始转动,经过t s达到OB,求h与t之间的函数解析式,并计算经过45 s后缆车距离地面的高度.
![](https://img.xkw.com/dksih/QBM/2019/4/29/2192899254394880/2193824114253824/STEM/f8ab4a9478524b07bf2676145012fbd0.png?resizew=181)
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