如图,在四棱锥
中,底面
是边长为3的正方形,侧面
底面
.
,求证:
;
(2)若
与平面
所成角为
,求点A到直线
的距离.
![](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/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142b5bb5452fa06ab3d0d556ae1b9088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd8ba7eb52e38857830162e770f534.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
22-23高一下·福建龙岩·期末 查看更多[2]
更新时间:2023-07-13 09:04:25
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知六面体
如图所示,
平面
,
,
,
,
分别是棱
上的点,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/0f6e693f-9a72-48da-8c90-67e628c95bdc.png?resizew=222)
(1)若
与
的交点为
,求证:
平面
;
(2)求证:平面
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d78d008923973b0529d4f7c9f1a2717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59264c566194933b9b4078a6b80fd83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc39144b305c67d44410d41053a1d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14421e30e9b0ef4eb3d621a1ae443ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4627749c34cf27cc6ae1971c25f9ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401076202a85356a2e99b6371c950579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef184e87ff9a34d519ae619634494d4c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/0f6e693f-9a72-48da-8c90-67e628c95bdc.png?resizew=222)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72344839908b65ee51295f7252f44cbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdd8495997644e739bddca2dce5a6915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】在三棱锥
中,底面ABC是边长为2的等边三角形,点P在底面ABC上的射影为棱BC的中点O,且PB与底面ABC所成角为
,点M为线段PO上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/1c1879cd-7779-45ca-ba13-711ccd663ac6.png?resizew=140)
(1)证明:
;
(2)若
,求点M到平面PAB的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7a3159579864a8ea0ab42005144864.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/1c1879cd-7779-45ca-ba13-711ccd663ac6.png?resizew=140)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736eca86008d535f03500d32ac00cd46.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3015f95d6827376819a63b9fcff405c0.png)
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名校
【推荐1】如图,在三棱锥
中,
是等边三角形,
,点
在BC上,
平面PAD.
平面PBC;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/938573218a7f963819446f473523d674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc2062ac3276ddd25fa9603f2eac26f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
您最近一年使用:0次
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名校
解题方法
【推荐2】如图,AB是半球的直径,O为球心,
,C为半大圆弧的中点,P为同一半大圆弧上的任意一点(异于A,B,C),P在水平大圆面AOB内的射影为Q,过Q作
于R,连接PR,OP.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/36ab08b9-5b04-4a82-ab3e-5f5d7c45b340.png?resizew=215)
(1)若C,P为不同的两点,求证:
;
(2)若半大圆面ACB与水平大圆面夹角大小为
,求三棱锥
体积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b008d7989d2a5b298d8ef4b006c6de4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/36ab08b9-5b04-4a82-ab3e-5f5d7c45b340.png?resizew=215)
(1)若C,P为不同的两点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77eba582214df1e41ecec400124fcd41.png)
(2)若半大圆面ACB与水平大圆面夹角大小为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f981b8ad7c315bf0ac288a4c7f91388.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,已知在四棱锥
中,底面
为直角梯形,
,
,
与
相交于点
.
(1)若点
在棱
上,且满足
,求证:
平面
;
(2)当
时,若
为
的三等分点,且靠近点
,试求三棱锥
的体积.
![](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/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27781f1fdbadedb2374c9ddc92caebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56070593385a9b141e5a571e7b7f181f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/12/44b06f0f-4f0e-454d-85a1-670c324374c2.png?resizew=154)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d74459f2a61d83e15882a5fe72c2f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af142a6050b54e8b5777a085d4597481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133f1a1a93df1d59c6c720540d8aba44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa1e4295bc0d50c2408596f6910fd74.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,四棱锥
中,
,
,
,
,
为等边三角形,
是棱
上一点.
![](https://img.xkw.com/dksih/QBM/2020/6/28/2494272466526208/2495076527390720/STEM/6e38e505a8c14f93bc0a328d066c6a7a.png?resizew=140)
(1)证明:
;
(2)若
平面
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c727506557f255b12dceda172517e014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2020/6/28/2494272466526208/2495076527390720/STEM/6e38e505a8c14f93bc0a328d066c6a7a.png?resizew=140)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba8f7af0e091e082100c3cd7f8c487f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e3320e0b4bbfce5bb9dc07cbebb0ae.png)
您最近一年使用:0次
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名校
【推荐3】如图,在四棱锥
中,底面
是等腰梯形,
,侧面
平面
,
,
,
为
的中点.
(1)证明:
平面
;
(2)点
在棱
上,直线
与平面
所成的角的正弦值为
,求
的值.
![](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/34e0a957a55460c72673c0f2ee90dbb3.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/b70e550fa3c5aaf1b9c28f36fd5ed5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77c16357eabed95d85bbd4e3dada92e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/f371ba93-80ea-4449-aaea-b02b100c3d14.png?resizew=140)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241a37fb1eff68a7133822b1b52d627e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,在直三棱柱
中,
,
,直线
与平面
所成角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2022/5/21/2984414625980416/2985069714915328/STEM/9e8e70df-cf21-4a4e-9bce-aa5842402db5.png?resizew=270)
(1)求证:平面
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27031fbda748bc03320346e7c4d26fe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2022/5/21/2984414625980416/2985069714915328/STEM/9e8e70df-cf21-4a4e-9bce-aa5842402db5.png?resizew=270)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08529daabff3c32b8321cd458757af42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2eb8ce1a71a148deb52b4c862b19d0b.png)
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解答题-证明题
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适中
(0.65)
解题方法
【推荐2】已知在直三棱柱
中,其中
为
的中点,点
是
上靠近
的四等分点,
与底面
所成角的余弦值为
.
求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532c567954f29362c5fdf14791903cf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/25/bbf0f572-b32d-4a27-91e6-ec1ce79c04f2.png?resizew=160)
求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0038a080c58ec7e69c1c304ea19c1a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
您最近一年使用:0次