1 . 在
中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e993bde3f1931058eb2c08c3e5bccee6.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca9e90a095dc00ba3289f61892d5832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e993bde3f1931058eb2c08c3e5bccee6.png)
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解题方法
2 . 在三角形
中,内角
对应边分别为
且
.
的大小;
(2)如图所示,
为
外一点,
,
,
,
,求
及
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509bf554c7f4a0e97d09a7a9059e3462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(2)如图所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e5357c1d8b14eb70ee029d2634db9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fcc9a4a6d0ad203358b16760fadc2d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0631374bf6479204a48d384b30bab46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-06-07更新
|
1742次组卷
|
3卷引用:江西省南昌市八一中学2024届高三下学期三模测试数学试题
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3 . 如图,21个相同的正方形相接,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/656187cb339306dc30333c58ab42a8c4.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/656187cb339306dc30333c58ab42a8c4.png)
您最近一年使用:0次
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4 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be9e5e920df76da0792ecf382fb4266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b3a74bec89aa74fc75261f53d2aec6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-06-05更新
|
1829次组卷
|
4卷引用:江西省南昌市第十九中学2024届高三下学期第五次模拟考试数学试卷
江西省南昌市第十九中学2024届高三下学期第五次模拟考试数学试卷江苏省南通、扬州、泰州七市2024届高三第三次调研测试数学试题(已下线)期末押题卷02(考试范围:苏教版2019必修第二册)-【帮课堂】(苏教版2019必修第二册)(已下线)专题02 三角恒等变换题型归纳-《期末真题分类汇编》(江苏专用)
名校
5 . 如图,已知正三棱锥
和正三棱锥
的侧棱长均为
.若将正三棱锥
绕
旋转,使得点
分别旋转至点
处,且
四点共面,点
分别位于
两侧,则下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf9718967af7a01c5b4866ea6f73bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f2d2ef6661d1808fed0cbd1b0fa53d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13ba83790c5605647e39a560641061c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf9718967af7a01c5b4866ea6f73bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff571c72c041d8668b4d2754679f64d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de83ce4d5ad4bb47d74cbd3bc3394ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e5d9f7e63d80a1969318ac999a3e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e925a4d4d706168d1ae69167483096c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
A.多面体![]() | B.![]() |
C.![]() ![]() | D.点![]() ![]() |
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2024-05-29更新
|
593次组卷
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2卷引用:江西省南昌市第十九中学2024届高三下学期第四次模拟考试数学试卷
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解题方法
6 . 如图,在扇形OAB中,半径
,
,C在半径OB上,D在半径OA上,E是扇形弧上的动点(不包含端点),则平行四边形BCDE的周长的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 已知
,下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d16eb8e742b091cbaf62cac1330886.png)
A.若![]() ![]() ![]() |
B.![]() ![]() ![]() |
C.![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2024-05-08更新
|
1044次组卷
|
4卷引用:江西省南昌市第十九中学2024届高三下学期第四次模拟考试数学试卷
江西省南昌市第十九中学2024届高三下学期第四次模拟考试数学试卷湖南省长沙市雅礼中学2024届高三下学期5月模拟(一)数学试卷(已下线)专题5 关键能力与方法问题(多选题10)广西南宁市第三中学五象校区2024届高三下学期适应性考试数学试题
8 . 如图所示,用一个不平行于圆柱底面的平面,截该圆柱所得的截面为椭圆面,得到的几何体称之为“斜截圆柱”.图一与图二是完全相同的“斜截圆柱”,AB是底面圆
的直径,
,椭圆所在平面垂直于平面ABCD,且与底面所成二面角为
,图一中,点
是椭圆上的动点,点
在底面上的投影为点
,图二中,椭圆上的点
在底面上的投影分别为
,且
均在直径AB的同一侧.
时,求
的长度;
(2)(i)当
时,若图二中,点
将半圆均分成7等份,求
;
(ii)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526908dfb46cf151b8ab1492a9d52047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c20e88a33043f4279fff360c81006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1d663b6001346d11600f064cfcb7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d26ebb800066a7bce57213cd074005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d26ebb800066a7bce57213cd074005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b20bf4f818b494e7b5fa9c68527026e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893ff0f9b64c66312c37cb7ce90c351d.png)
(2)(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c345907ebe27888332b1b44c666cc47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bde134aa77da12366e6a742fa33b4bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e578d74f75cf5a087cb5dbad1d07c66.png)
(ii)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0838e80d58bad3e9cbc4766d2a0ec3.png)
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解题方法
9 . 在
中,角
的对边分别是
,且
.
(1)求
的值;
(2)若
的面积为
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f449bf637a01f555f1b37d3a80c51414.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e563e032dfdef69b0f357060c27bd4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af37b719ffc531d9a84bcd4c47c79366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-05-02更新
|
1842次组卷
|
3卷引用:江西省南昌市第十九中学2024届高三下学期第四次模拟考试数学试卷
解题方法
10 . 在
中,角A,B,C所对的边分别为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33e8045277a342dbbaff481815bd532.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc341c1340550e3b63e1c363ce0dc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33e8045277a342dbbaff481815bd532.png)
您最近一年使用:0次