在四棱锥
中,底面ABCD是边长为2的菱形,
交
于O,
,
,
.
(1)求P到平面
的距离;
(2)求钝二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3eedeededdc7c9eb023aec9a101981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7383ab3dc2ae9dce9b6ff0f8c4fb26.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/d083672e-6689-41c5-b467-9f21a3a6dd05.png?resizew=160)
(1)求P到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求钝二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
更新时间:2024-03-12 06:30:27
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图,在四棱锥
中,底面
是边长为2的菱形,
是
的中点,
分别是棱
上靠近点
和点
的三等分点,
.
![](https://img.xkw.com/dksih/QBM/2022/7/1/3013104712400896/3013956856807424/STEM/93de8c677fef4e0aa6515cc6ab7c6fae.png?resizew=255)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
平面
.
(2)求点
到平面
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/6b6e20c4731895d251346b493c70231c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a18acf6f3ac34f1ed86416d83ae4ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f1797c520252319dcc0195b720aec6.png)
![](https://img.xkw.com/dksih/QBM/2022/7/1/3013104712400896/3013956856807424/STEM/93de8c677fef4e0aa6515cc6ab7c6fae.png?resizew=255)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,已知直三棱柱
,
,
,
,点
为
的中点.
(1)证明:
∥平面
;
(2)求直线AB1到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/30/04463e81-3f25-42ac-b542-ff2fc7e23477.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
(2)求直线AB1到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.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,在四棱柱
中,
平面
,底面
是边长为1的正方形,侧棱
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/21962f22-a9f4-4468-9fc7-a83b7e2b0a6d.png?resizew=150)
(1)求证:
平面
;
(2)求证:
;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46f43920d092fa43fc2e588404d89c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4560fa4ad459b58b723c74bd24e51ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8de09f90729b8dc777c75b90c7cdb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/21962f22-a9f4-4468-9fc7-a83b7e2b0a6d.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92bced6bf70db7229db85f2b10339431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d2ea2278a2f06b269d64fb02fbad93.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f02729f422d1d35d1c14465bffff26.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2】如图是一几何体的直观图、主视图、俯视图、左视图.
(1)若F为PD的中点,求证:AF⊥面PCD;
(2)求面PEC与面PCD所成的二面角(锐角)的余弦值.
(1)若F为PD的中点,求证:AF⊥面PCD;
(2)求面PEC与面PCD所成的二面角(锐角)的余弦值.
![](https://img.xkw.com/dksih/QBM/2011/5/24/1570222129602560/1570222134591488/STEM/ed1e809de3dc44139a03085637840927.png?resizew=266)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】在三棱锥
中,
平面
,
,点
在平面
内,且满足平面
平面
垂直于
.
时,求点
的轨迹长度;
(2)当二面角
的余弦值为
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8248c6a53aaa9419370f1d8adf2db72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf3ef95ed4461294d5a756af7592860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9989226d2596116d91a611de93d03dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde460d9f9825efb46557f38318e3f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8964e388fc0da7f6dd81bb9bda44f2a5.png)
您最近一年使用:0次