名校
解题方法
1 . 如图,在正三棱台
中,
,
,过棱
的截面
与棱
,
分别交于
、
.
(1)记几何体
和正三棱台
的体积分别为
,
,若
,求
的长度;
(2)若
,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/f54638dd4ebf19815a1333d84e42f927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/21/5500af58-f705-43a1-b87a-20cb2dd9779a.png?resizew=182)
(1)记几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae55ec08598586beba0b48f7315e596c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbdd978c1b5c790670e8eac1ca2ae969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68a44992693cc6bbfa489a59a9e00cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
您最近一年使用:0次
2023-06-20更新
|
273次组卷
|
2卷引用:浙江省衢州市2022-2023学年高二下学期期末数学试题
解题方法
2 . 在矩形
中,
,
,点
为线段
上的中点,沿
将
翻折,使得
,点
在线段
上且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/19/15806d1c-89e7-4093-902c-bb5cb86c4cb8.png?resizew=204)
(1)证明:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101da161ae17652ccbe7d3f888762c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69509ad4786945359ce950ad284d0c1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d669df6c391aa83150df5ae96c39d8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/19/15806d1c-89e7-4093-902c-bb5cb86c4cb8.png?resizew=204)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e462c38951671d0dbbea78246da9f580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
3 . 如图1,在
中,
,
,
,且
分别为BC,AD的中点,延长CE交AB于点F.现将△ACD沿AD翻折至△AC'D,使得
,如图2所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/19/8b25cad7-4f05-4702-a9c6-93257f85a5df.png?resizew=493)
(1)求证:
;
(2)点G为线段C'D的中点,求直线FG与平面BEC'所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178a27068cf5517ad64f211af10256ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c7f0d0987ee427b7efbbf889b9bf16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794cd813dabab72619eb276f93c1769e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/19/8b25cad7-4f05-4702-a9c6-93257f85a5df.png?resizew=493)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed96a8bd80187c8ed5fdf272832ca8a4.png)
(2)点G为线段C'D的中点,求直线FG与平面BEC'所成角的正弦值.
您最近一年使用:0次
解题方法
4 . 如图,在圆锥
中,轴截面
是边长为2的等边三角形,点
为高
上一动点,圆柱
为圆锥
的内接圆柱(内接圆柱的两个底面的圆周都在圆锥表面上).点
为圆锥底面的动点,且
.则( )
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759900325306368/2777778681757696/STEM/dd258b333c9a4281bfb23aa6b64e451f.png?resizew=189)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f04e898cd5458f14e93d443a721678.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759900325306368/2777778681757696/STEM/dd258b333c9a4281bfb23aa6b64e451f.png?resizew=189)
A.圆柱![]() ![]() |
B.圆柱![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |
您最近一年使用:0次
2021-08-02更新
|
448次组卷
|
3卷引用:浙江省衢州市乐成寄宿中学2021-2022学年高一下学期期中数学试题
5 . 如图,在平面四边形
中,
,M在直线
上,
,
,
绕
旋转.
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648790370820096/2650026749878272/STEM/838c09b4-f7ad-4e32-9f49-9d613b46ca22.png)
(1)若
所在平面与
所在平面垂直,求证:
平面
.
(2)若二面角
大小为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0991d38c6edebb9740ab1061437c720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3fb1c94a174362ba469507cb532afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef76bc37e256a2786bf6b44a32b87110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831b29431c9b0177fa86f841417e89e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159aa852de7f5b236072c5251669bff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648790370820096/2650026749878272/STEM/838c09b4-f7ad-4e32-9f49-9d613b46ca22.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159aa852de7f5b236072c5251669bff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4e1e8fda90563d2dec09d15e676bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db7e46fef4f27799aec83a8bfb8eae8.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b954e54a5057567d826beea1791ff362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
您最近一年使用:0次
解题方法
6 . 如图,四棱台
中,底面
与侧面
为相似的等腰梯形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/81e6cc34-d7ff-4a1e-9e1e-73fa06152f19.png?resizew=188)
(Ⅰ)求证:
平面
;
(Ⅱ)若二面角
的平面角为
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856b7f7d890ea69f5b56f1e041ee0e37.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/81e6cc34-d7ff-4a1e-9e1e-73fa06152f19.png?resizew=188)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a6ca1d6b37072bd7df0cf77737bb79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ef28bae91603373014bff6154c6fc2.png)
(Ⅱ)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7f8c25db6247cb7bf47c2082926004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ef28bae91603373014bff6154c6fc2.png)
您最近一年使用:0次
19-20高二·浙江·期末
名校
7 . 已知等腰梯形
中(如图1),
,
,
为线段
的中点,
、
为线段
上的点,
,现将四边形
沿
折起(如图2)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/b7452e5c-e5af-4539-979a-b1aa9f0f4815.png?resizew=347)
(1)求证:
平面
;
(2)在图2中,若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9a3a86b6a0ac804bfda41f02c6ed8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115937cd3ac10da7673365310cddd8fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/b7452e5c-e5af-4539-979a-b1aa9f0f4815.png?resizew=347)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f33fa5152ba27f7b8a28890cefca219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)在图2中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29470a095de205acb450d5a48b38be1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
您最近一年使用:0次
2020-03-05更新
|
463次组卷
|
5卷引用:2020届浙江省衢州二中高三下学期第一次模拟考试数学试题
2020届浙江省衢州二中高三下学期第一次模拟考试数学试题(已下线)【新东方】新东方高二数学试卷292(已下线)【新东方】新东方高二数学试卷298浙江省杭州市高级中学2019-2020学年高二上学期期末数学试题(已下线)专题19 立体几何综合-2020年高考数学母题题源全揭秘(浙江专版)
8 . 如图,
是以
为斜边的等腰直角三角形,
中
,
沿着
翻折成三棱锥
的过程中,直线
与平面
所成的角均小于直线
与平面
所成的角,设二面角
,
的大小分别为
,
,则( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/872de830-5dcf-46cd-b6ad-c2351981fc74.png?resizew=180)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178a27068cf5517ad64f211af10256ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d1c5eace748465b2dad5065f5111c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/872de830-5dcf-46cd-b6ad-c2351981fc74.png?resizew=180)
A.![]() | B.![]() |
C.存在![]() | D.![]() ![]() |
您最近一年使用:0次
名校
9 . 已知三棱台
的下底面
是边长为2的正三角形,上地面
是边长为1的正三角形.
在下底面的射影为
的重心,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/5783417a-89f6-4ae4-9520-bbfd35fa51b7.png?resizew=149)
(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/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68b4beefade8076bea97d01c0251fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/5783417a-89f6-4ae4-9520-bbfd35fa51b7.png?resizew=149)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e16f65c3a318220c2f5baac171bbb61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
您最近一年使用:0次
2020-06-08更新
|
498次组卷
|
3卷引用:浙江省衢州二中2018届高三下学期第二次模拟考试数学试题
名校
解题方法
10 . 如图,在四棱锥
中,
平面
,底面是棱长为
的菱形,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/5784c08c-8831-4e86-9694-ebeba116736d.png?resizew=195)
(1)求证:
//平面
;
(2)求直线
与平面
所成角的正切值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c161375e4e6f61f1cbef8083c02e975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364d6c88726d8c3bb8ed297057332bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/5784c08c-8831-4e86-9694-ebeba116736d.png?resizew=195)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2019-08-02更新
|
1074次组卷
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4卷引用:【校级联考】浙江省衢州五校2018-2019学年高二第二学期期中联考数学试题