已知圆锥的顶点为A,过母线AB,AC的截面面积是
.若AB,AC的夹角是
,且AC与圆锥底面所成的角是
,求圆锥的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
更新时间:2023-08-02 15:22:05
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相似题推荐
【推荐1】西安市建造圆锥形仓库用于储存粮食,已建的仓库底面直径为
,高为
.随着西安市经济的发展,粮食产量的增大,西安市拟建一个更大的圆锥形仓库,以存放更多的粮食.现有两种方案:一是新建的仓库底面半径比原来大
(高不变);二是高度增加
(底面直径不变).
(1)分别计算按这两种方案所建的仓库的体积;
(2)分别计算按这两种方案所建的仓库的表面积;
(3)哪个方案更经济些?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7854968bbf6576a1fd9926ee0d4d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7854968bbf6576a1fd9926ee0d4d63.png)
(1)分别计算按这两种方案所建的仓库的体积;
(2)分别计算按这两种方案所建的仓库的表面积;
(3)哪个方案更经济些?
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解题方法
【推荐2】如图,
,
,
,点C是OB的中点,
绕OB所在的边逆时针旋转一周.设OA逆时针旋转至OD时,旋转角为
,
.
(1)求
旋转一周所得旋转体的体积V和表面积S;
(2)当
时,求点O到平面ABD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4c2a4806153e8a325dced62a258314.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/24c7fc1b-6b75-4104-ab2a-29fffa6ff4dd.png?resizew=146)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd15ead753cf2927f51d07c7727c6cd9.png)
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【推荐1】在正方体
中,O是底面ABCD对角线的交点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/cc48bcf3-be1a-4367-8cf3-99c697fff4cb.png?resizew=164)
(1)求证:BD⊥平面
;
(2)求直线
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/cc48bcf3-be1a-4367-8cf3-99c697fff4cb.png?resizew=164)
(1)求证:BD⊥平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
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【推荐2】如图,在三棱台
中,
,
,点D在棱
上,且
.
(1)求证:D为
的中点;
(2)记二面角
的大小为
,直线
与平面
所成的角为
,若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b80ec548625badf9967afe49fd5871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a789e68bd594da59c5134314f5fee3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/c84c7d51-f1d1-40c4-a688-dc518d3f86c5.png?resizew=166)
(1)求证:D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
(2)记二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfeb93372b5ff8acf1f88d82a6086218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60de8263993e87a4b1575f830c78b03c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63fe57d4fbae536de2e641d9d349fcf1.png)
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【推荐3】如图,在等腰梯形ABCD中,
面
,
面
,
,点P在线段EF上运动.
;
(2)是否存在点P,使得平面PAB与平面ADE所成二面角余弦值为
,若存在,试求点P的位置,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62205a19068497616880dc2314c34b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0150b31a043805bfaa407be3162002ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8455347237248c7701100642c5b119.png)
(2)是否存在点P,使得平面PAB与平面ADE所成二面角余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013552105bb2e358f80cd9585b60e829.png)
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【推荐1】如图,四棱锥P-ABCD的底面ABCD是边长为4的正方形,平面PAD⊥平面ABCD,
是以PA为斜边的等腰直角三角形,PA=
,E,F分别是棱PA,PC的中点,M是棱BC上一点.
![](https://img.xkw.com/dksih/QBM/2022/1/25/2902193765310464/2918165220483072/STEM/2921ea7e-a6f4-4c77-8f11-83602464aa1e.png?resizew=167)
(1)求证:平面DEM⊥平面PAB;
(2)若直线MF与平面ABCD所成角的正切值为
,求锐二面角E-DM-F的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://img.xkw.com/dksih/QBM/2022/1/25/2902193765310464/2918165220483072/STEM/2921ea7e-a6f4-4c77-8f11-83602464aa1e.png?resizew=167)
(1)求证:平面DEM⊥平面PAB;
(2)若直线MF与平面ABCD所成角的正切值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
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【推荐2】如图,四面体ABCD中,
,
,二面角
的大小为
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/46dc0780-8834-4d77-995b-3c558a3f23ba.png?resizew=244)
(1)若
,M是BC的中点,N在线段DC上,
,求证:
平面AMN;
(2)当BP与平面ACD所成角最大时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303c1b9cdc11fa0cb87133b96c98d52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457e812589ad726cacc3cf4c7e6aefdf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/46dc0780-8834-4d77-995b-3c558a3f23ba.png?resizew=244)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737f735855a1ef2cd1dd718ae56e93e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d809626d493659af6f297326fa3f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1979eb6335c5abfe5404e8ce4d051a.png)
(2)当BP与平面ACD所成角最大时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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【推荐3】如图,四棱锥
中,
,且
,
,
,
是
的中点,平面
平面
.
平面
;
(2)若直线
与平面
所成的角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625bca170fed3fbdc1441b3c0df4a6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
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