1 . 摩天轮是一种深受大家喜爱的大型游乐设施,游客坐在摩天轮的座舱里慢慢地往上转,可以从高处俯瞰四周景色. 某摩天轮的半径为50米,圆心O距地面的高度为50米,摩天轮做匀速运动,每3分钟转一圈,点P的起始位置在摩天轮的最低点出,已知摩天轮上一点P在时刻t(单位:分钟)距离地面的高度y(单位:米)满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae10ec457a9bd065fa4a1020a8b65994.png)
(1)根据条件写出y(单位:米)关于t(单位:分钟)的函数解析式.
(2)若游客在距离地面的高度达到了85m时能够获得最佳视觉效果,请问摩天轮转动一周能有多长时间使游客有最佳视觉效果?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e14c42e06e01d49b5afc907fe69d57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae10ec457a9bd065fa4a1020a8b65994.png)
(1)根据条件写出y(单位:米)关于t(单位:分钟)的函数解析式.
(2)若游客在距离地面的高度达到了85m时能够获得最佳视觉效果,请问摩天轮转动一周能有多长时间使游客有最佳视觉效果?
您最近一年使用:0次
名校
2 . 在三棱柱
中,侧面
为矩形,
,
,D在棱
上,且
,
与
交于点O,且
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/46a47f2d-4999-402c-8ec4-f19e4a71a270.png?resizew=178)
(1)证明:
;
(2)若
,求直线
与平面
所成角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeab46157999e3163d89991282890186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeebdf3d00c146a1b4d220909d7573c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/46a47f2d-4999-402c-8ec4-f19e4a71a270.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7768503b1ad4775258b2f1a71c413086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f842145a92b63d04c0fe88001f01d31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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3 . 如图,在四棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f022f201dbd14f38b45ca33d30c631e.png)
,底面
为正方形.记直线
与平面
所成的角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/76465f92-3e86-4c66-8b74-52982ee84605.png?resizew=196)
(1)求证:平面
平面
;
(2)若二面角
的大小为
,求
的值;
(3)当
时,
、
中点为
,
,点
为线段
上的动点(包括端点),
,二面角
的大小记为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f022f201dbd14f38b45ca33d30c631e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea574e021151141d6a56e5fb8f70ca3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/76465f92-3e86-4c66-8b74-52982ee84605.png?resizew=196)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5000fea066102e62cf2128ccbbd2b3e3.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56fbfbab5bd0989259b00490ee118947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ad7d1e3fad77908415415d6b2a90f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af2fa3f00743e79487e96b81b9e1290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24146db7088bd19886b14ad0d4c1d32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
您最近一年使用:0次
2022-07-20更新
|
1311次组卷
|
2卷引用:辽宁省大连市2021-2022学年高一下学期期末数学试题
名校
4 . 已知梯形
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/18/2981893460721664/2982340511793152/STEM/21ab9aed-515d-41ae-9b6c-064c45308291.png?resizew=175)
(1)求
的最大值,此时
等于多少?
(2)求梯形
面积的最大值,此时
等于多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc6b94f23607ff4261c371ec9425c8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a0edf53b56ee015f9a7b1a083da275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ed15020c1c669e06a3a3b1557242e9.png)
![](https://img.xkw.com/dksih/QBM/2022/5/18/2981893460721664/2982340511793152/STEM/21ab9aed-515d-41ae-9b6c-064c45308291.png?resizew=175)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6151fb896230f2579d516af4c67e634a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)求梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2011·辽宁·一模
5 . 如图,在三棱柱
中,已知
,
,
,
侧面
.
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570129470603264/1570129475846144/STEM/f44095fce6944042965ed1eec0106c10.png?resizew=283)
(1)求直线
与底面
所成角正切值;
(2)在棱
(不包含端点
)上确定一点
的位置,使得
(要求说明理由);
(3)在(2)的条件下,若
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f60b72ee0127c4c20a448575f219e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570129470603264/1570129475846144/STEM/f44095fce6944042965ed1eec0106c10.png?resizew=283)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8239d94c830497c40359d1312ec4b282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7fda523ada8989e466d797b6fcd2e0.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69cbd2557ef69775b5a883c510091985.png)
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