如图,设底面半径为
的圆锥的顶点、底面中心依次为
、
,
为其底面的直径.点
位于底面圆周上,且
.异面直线
与
所成角的大小为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/4339cfed-88e8-4483-8b87-959e542211de.png?resizew=191)
(1)求此圆锥的体积;
(2)求二面角
的大小(结果用反三角函数值表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcbae1c72f88434bc244619fcc7c9f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/4339cfed-88e8-4483-8b87-959e542211de.png?resizew=191)
(1)求此圆锥的体积;
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89f615a3799591b96e6efbc941b8ef3.png)
2021·上海普陀·二模 查看更多[1]
更新时间:2021-05-05 07:34:55
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,四边形
与
均为菱形,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/d8f51610-b1dc-41e1-b6d9-694b290143cc.png?resizew=210)
(1)求证:
平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6b27bd5f1437c638082a7eec033b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8083bd859ca71ed9d103672eacff93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/d8f51610-b1dc-41e1-b6d9-694b290143cc.png?resizew=210)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78833634e0eebe841479b958f061ef8.png)
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解题方法
【推荐2】如图①,在等腰三角形
中,
,
,
,
分别在边
,
上,且满足
.将
沿直线
起到
的位置,连接
,
,得到如图②所示的四棱锥
,点
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/b7719b1f-f77e-4566-b39c-f3e1f55dad46.png?resizew=315)
(1)证明:
平面
;
(2)当
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94911ca2a27e4a36c55cdd44a74a9a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2b15bc019d36ef9892d2a6466a300d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e7cedc39297d66dbb177f2a1f6bee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a914673c349b73ce2c595b8971972b3a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/b7719b1f-f77e-4566-b39c-f3e1f55dad46.png?resizew=315)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb88289c2aed70bade0bddea6d1dd72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8511319e215aeba124994a03f2d91fcb.png)
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解答题
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适中
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解题方法
【推荐1】如图,平行四边形
所在平面与直角梯形
所在平面互相垂直,且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2015/7/27/1572194870935552/1572194877292544/STEM/50b01b9550a14087870ddccf306dcf66.png)
(1)求异面直线
与
所成的角;
(2)求平面
与平面
所成的二面角(锐角)的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5e9ae00055f1c458d543d8c78b7fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec951a1a2d763cf54749cc2c874b57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/2015/7/27/1572194870935552/1572194877292544/STEM/50b01b9550a14087870ddccf306dcf66.png)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐2】如图,在四棱锥
中,底面ABCD为矩形,
平面ABCD,
,
,
,求下列异面直线所成角的余弦值:
(2)PC与AD;
(3)PC与BD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e713f0ba80e87438cf6273fb00cb81a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
(2)PC与AD;
(3)PC与BD.
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解答题-证明题
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适中
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【推荐1】如图,在四棱锥S﹣ABCD中,侧面SCD为钝角三角形且垂直于底面ABCD,
,点M是SA的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/0b1d512a-660b-4937-b414-a678c2564ff6.png?resizew=187)
(1)求证:
平面SCD;
(2)若直线SD与底面ABCD所成的角为
,求平面MBD与平面SBC所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7812ef34a2b02f9ce73952d5db2eee35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0254c51c4e3e5ca7190cb4cd97defbb5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/0b1d512a-660b-4937-b414-a678c2564ff6.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
(2)若直线SD与底面ABCD所成的角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
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【推荐2】如图,四棱锥
中,底面ABCD是边长为2的菱形,
,
,且
,E为PD的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898567852834816/2900094343077888/STEM/bd78b44063e34ec697df375499ecf99f.png?resizew=277)
(1)求证:
;
(2)求二面角
的大小;
(3)在侧棱PC上是否存在点F,使得点F到平面AEC的距离为
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c64ba26399dfb1233bea8cf59da2dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898567852834816/2900094343077888/STEM/bd78b44063e34ec697df375499ecf99f.png?resizew=277)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd8ba7eb52e38857830162e770f534.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
(3)在侧棱PC上是否存在点F,使得点F到平面AEC的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1145c162038df3c7184d9201c628e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e0225c6d7f9c9125bcd7154285096d.png)
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