如图,在四棱锥
中,
平面
,底面
是矩形,且
,
,点
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/caa529c1-48c9-4ff2-abfc-1bbdf280d3fc.png?resizew=303)
(1)求直线
与平面
所成角的正弦值;
(2)设直线
与平面
交于点
,求点
到平面
的距离.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58097af4081e62c2ec10c006828fa544.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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/caa529c1-48c9-4ff2-abfc-1bbdf280d3fc.png?resizew=303)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
更新时间:2022-11-02 12:58:00
|
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【推荐1】已知空间中三点
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(1)当
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适中
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【推荐2】在正方体
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的中点.求:
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解答题-问答题
|
适中
(0.65)
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解题方法
【推荐1】如图,在长方体
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/6001b788-7626-475b-bbbd-8641b18f003a.png?resizew=182)
(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d425c74a134abc4893e45f5ae22a703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/6001b788-7626-475b-bbbd-8641b18f003a.png?resizew=182)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】在三棱锥
中,
是边长为2的等边三角形,
,
且平面
平面
,
,
分别为线段
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/572a959b-2046-42a1-807d-ae843c1936f7.png?resizew=129)
(1)求证:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3931333820859378ea6723ff3075189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d6e65c7f741e0ff37244cded47605e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/572a959b-2046-42a1-807d-ae843c1936f7.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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1】如图,在四棱锥P-ABCD中,PC⊥底面ABCD,底面ABCD是直角梯形,AB⊥AD,AB
CD,|AB|=2|AD|=2|CD|=2,E是PB的中点.二面角
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![](https://img.xkw.com/dksih/QBM/2021/12/19/2875829121490944/2878721261887488/STEM/6a92e88a5c7a4058b723928f02fa2702.png?resizew=195)
(1)求直线PA与平面EAC所成角的正弦值;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://img.xkw.com/dksih/QBM/2021/12/19/2875829121490944/2878721261887488/STEM/6a92e88a5c7a4058b723928f02fa2702.png?resizew=195)
(1)求直线PA与平面EAC所成角的正弦值;
(2)求点D到平面ACE的距离.
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,四棱锥
的底面为正方形,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/0eed2f4d-8e6e-4ac5-8bb0-52294b84a057.png?resizew=158)
(1)证明:
四点共面;
(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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a963043aba5c00325328a5ebd28a44bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e7b9c89af8b9e765a103b0ca317b04.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/0eed2f4d-8e6e-4ac5-8bb0-52294b84a057.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b55e4738f225d13bb46a4fd762ee9fba.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588690c4a218025937357ffab8d63c7a.png)
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