解题方法
1 . 如图,在直三棱柱
中,底面
是
的等腰直角三角形,
,
是
边的中点.
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733710027284480/2800959097151488/STEM/09e7bf4e-6b7b-414f-b282-e24f057439c2.png?resizew=254)
(1)证明:
平面
.
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d768ffd5bf75080e8ff5ce6b472c0cc0.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733710027284480/2800959097151488/STEM/09e7bf4e-6b7b-414f-b282-e24f057439c2.png?resizew=254)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2213b575a7cfaffcdf91885005c7d.png)
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名校
解题方法
2 . 如图,在长方体
中,
,
,点
,
分别是
,
的中点,则异面直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/2021/5/7/2716000481984512/2784649411403776/STEM/52d9d41d-d8ca-4ac6-a526-3985f1e7ddd4.png?resizew=262)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://img.xkw.com/dksih/QBM/2021/5/7/2716000481984512/2784649411403776/STEM/52d9d41d-d8ca-4ac6-a526-3985f1e7ddd4.png?resizew=262)
A.![]() | B.![]() | C.0 | D.![]() |
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2卷引用:河北省邯郸市九校联盟2020-2021学年高一下学期期中数学试题
名校
3 . 已知在三棱锥
中,
为
中点,
平面
,
,
,下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.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/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9b8e7befcb7881c294070175b1a554.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/15/059c0201-fae4-464e-9f63-9953dd522585.png?resizew=179)
A.若![]() ![]() ![]() |
B.若![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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3卷引用:河北省邯郸市九校联盟2020-2021学年高一下学期期中数学试题
名校
4 . 在三棱锥
中,
,
,O是线段AC的中点,M是线段BC的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/24/2727944968609792/2784140693921792/STEM/7f0072b1-4832-47a9-a859-3bed05792841.png)
(1)求证:PO⊥平面ABC;
(2)求直线PM与平面PBO所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca9de4b28493cb6f8fc83cf294c5cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80137ee8af4684ce558242d8b3f1459.png)
![](https://img.xkw.com/dksih/QBM/2021/5/24/2727944968609792/2784140693921792/STEM/7f0072b1-4832-47a9-a859-3bed05792841.png)
(1)求证:PO⊥平面ABC;
(2)求直线PM与平面PBO所成的角的正弦值.
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4卷引用:河北省易县中学2020-2021学年高一下学期5月月考数学试题
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5 . 在正三棱柱
中,
,点
、
、
分别为
、
、
的中点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
A.直线![]() ![]() |
B.平面![]() ![]() |
C.三棱柱外接球的表面积为![]() |
D.直线![]() ![]() ![]() |
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3卷引用:河北省衡水市第十四中学2020-2021学年高一下学期期末数学试题
6 . 如图,梯形
中,
,过
作
于E,沿AE把ADE折起,设点D折起后的位置为P,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/6cd8dbe3-9284-462c-8d19-71b8241823e9.png?resizew=405)
(1)求证:平面
平面
;
(2)在棱PC上是否存在一点F,使直线
平面
?并说明理由;
(3)求直线PB与平面PAE所成的角.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c4cadf1e139a1401123729d5e8f7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4bd50537f6b0fca642a424202b87b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/6cd8dbe3-9284-462c-8d19-71b8241823e9.png?resizew=405)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)在棱PC上是否存在一点F,使直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(3)求直线PB与平面PAE所成的角.
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2卷引用:河北省廊坊市2020-2021学年高一下学期期末数学试题
名校
7 . 已知直三棱柱
中,
,
,
是
的中点,
为
的中点.点
是
上的动点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/0598e4bd-58da-4702-a34d-f62bde017868.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6ff6a807f5639faac835012b3728c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/0598e4bd-58da-4702-a34d-f62bde017868.png?resizew=170)
A.当点![]() ![]() ![]() ![]() ![]() |
B.无论点![]() ![]() ![]() |
C.当点![]() ![]() ![]() ![]() ![]() ![]() |
D.当点![]() ![]() ![]() ![]() ![]() |
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5卷引用:河北省石家庄市2020-2021学年高一下学期期末数学试题
8 . 如图,在三棱锥
中,
,
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/0d68356a-aa85-41df-a21b-663b82d1a1ad.png?resizew=151)
(1)求证:平面
平面
;
(2)若
,
是
的中点,求
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c646c683fbe522edb7ea54fd3ad873d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/0d68356a-aa85-41df-a21b-663b82d1a1ad.png?resizew=151)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587df01a98f499a9f361aafd8c3dac39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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2021-08-03更新
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2卷引用:河北省邯郸市2020-2021学年高一下学期期末数学试题
解题方法
9 . 在长方体
中,底面
是边长为2的正方形.
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761425456603136/2776587039039488/STEM/a64839ef-0eff-4d71-9809-327e537e8c28.png?resizew=239)
(1)若
为
的中点,试在
上确定一点
,使得
平面
;
(2)直线
与平面
所成的角为
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761425456603136/2776587039039488/STEM/a64839ef-0eff-4d71-9809-327e537e8c28.png?resizew=239)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e06947327f4c41340b8713e8a6b4c87.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756d4d8a7051af5dae3ef56cb9e47c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d298da8fb71af7be02890555f5ca96.png)
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2021-08-01更新
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2卷引用:河北省唐山市2020-2021学年高一下学期期末数学试题
名校
解题方法
10 . 已知正四棱锥的体积为12,底面对角线的长为
,则侧面与底面所成的二面角的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
A.60° | B.45° | C.30° | D.75 |
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2021-07-30更新
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2卷引用:河北省唐山市开滦第二中学2022-2023学年高一下学期6月月考数学试题