圆锥的轴截面为等腰
,
为底面圆周上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/a6d0daf3-91b1-4a6f-997c-0fddc2dccbdc.png?resizew=173)
(1)若
的中点为
,
,求证:
平面
;
(2)如果
,
,求此圆锥的侧面积;
(3)如果二面角
的大小为
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d75a6a86f42c10a278c4089ae12baf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/a6d0daf3-91b1-4a6f-997c-0fddc2dccbdc.png?resizew=173)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee971942ad5cd2808f3c8f79b0b6630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65e18509e2d8927f99bbcb017d7ad07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edca7e25845429d727381e9e80024aa0.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36661d21afbefdf69f26179ad1454b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a1b290208282a861055b2cb0ecaa514.png)
(3)如果二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc15b31f2852bcbe52486962299a068e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4636d00a9dbce491708417ec815440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013d26b5112e3a11b81955bd65043ddc.png)
21-22高一下·上海闵行·期末 查看更多[2]
更新时间:2022-12-01 10:20:03
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】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)
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【推荐2】如图,在底面半径为1,高为
的圆锥中,O是底面圆心,P为圆锥顶点,A,B是底面圆周上的两点,
,C为母线PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/2e31b3bf-61fb-4e4a-b09f-a393829754c1.png?resizew=129)
(1)求该圆锥的表面积;
(2)求在该圆锥的侧面上,从A到C的最短路径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a4c11d41372175ba3541a44c3376b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/2e31b3bf-61fb-4e4a-b09f-a393829754c1.png?resizew=129)
(1)求该圆锥的表面积;
(2)求在该圆锥的侧面上,从A到C的最短路径的长.
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解答题-问答题
|
适中
(0.65)
【推荐3】如图,
是圆锥的母线,延长底面圆
直径
到点
,使得
,直线
与圆
切于点
,已知
,二面角
的大小为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/86abcc18-ea88-48d6-b547-310460ecc340.png?resizew=174)
(1)求该圆锥的侧面积;
(2)若平面
平面
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.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/51dc424cdea009615f880f54bd2f09f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9708a0668136cc28d035fbf295e87a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/86abcc18-ea88-48d6-b547-310460ecc340.png?resizew=174)
(1)求该圆锥的侧面积;
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba759550d6c10ffd2922b936888f3973.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在四棱锥
中,
底面
是
的中点.
(1)证明:
平面
;
(2)求
和平面
所成的角的正切值.
![](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/79b32936dfcde8cc02ec6f4cbf6afe7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://img.xkw.com/dksih/QBM/2017/2/10/1625066086277120/1625066086907904/STEM/8d1d18d2-5f02-4336-8be7-597f1a6d0b4a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在长方体
中,
、
分别是棱
、
上的点,
,
.
(1)证明:
平面
;
(2)求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bf5a334c1cd75f931983fedc4a62da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8712bdebabae7f72c09d75aa29f1819b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/4bd8f1f0-aecf-4c79-8591-acfe4d2c672e.png?resizew=144)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c9f260496ba23993238601a89eca5c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa59c02ebdfa403086d86469a2767d4.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图所示,在正四棱锥
中,O为底面正方形的中心,E为侧棱PB上的动点.侧面PAD与底面ABCD所成的二面角的平面角为60°.
![](https://img.xkw.com/dksih/QBM/2021/12/23/2878631621091328/2892985233072128/STEM/ed5c4e00-a72d-472d-b4ff-2bbeafb5571b.png?resizew=180)
(1)求侧棱PA与底面ABCD所成的角的正切值;
(2)若
,问在棱AD上是否存在一点F,使
侧面PBC,若存在,试确定点F的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/2021/12/23/2878631621091328/2892985233072128/STEM/ed5c4e00-a72d-472d-b4ff-2bbeafb5571b.png?resizew=180)
(1)求侧棱PA与底面ABCD所成的角的正切值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ada8c6bf90da64d90d00bc6c586af7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,四棱锥
中,底面
为四边形,
是边长为2的正三角形,
,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/44e7e48e-44fc-464f-8032-7294abc9f832.png?resizew=137)
(1)求证:
平面
;
(2)若二面角
的平面角的余弦值为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/44e7e48e-44fc-464f-8032-7294abc9f832.png?resizew=137)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ad3801636f311f226766d93859851e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1145c162038df3c7184d9201c628e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】如图,在四棱锥
中,
底面
,
,
,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/41a3a54f-1be8-4651-ad79-b25269cb3397.png?resizew=194)
(1)求证:
;
(2)在线段
上,是否存在一点
,使得二面角
的大小为
,如果存在,求
与平面
所成的角的正切值,如果不存在,请说明理由.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c41757ae282475fb29ec1e8e02045d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8c91e4c85a9da7f54b2237d870a50d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/41a3a54f-1be8-4651-ad79-b25269cb3397.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698335f4880c7a298f4898c83b6562bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次