1 . 如图,有一个斜坡
长
,坡顶离地面的高度
为
,则
的正弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9166a6de3f2debeb60a7f297f5fd08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50be18ebc9b5130c15f7365e2b8a7bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/0c2ef4ca-528e-4d3d-9cb1-d50416724965.png?resizew=241)
您最近一年使用:0次
2023-03-08更新
|
151次组卷
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3卷引用:河南省郑州市郑州经济技术开发区2022-2023学年九年级上学期期末数学试题
2 . 如图,点A,B,C都在正方形网格的格点上,则
的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/ce84c386-50b5-4cbe-8f80-58a8297673e6.png?resizew=102)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd01722c6f4bf06ae7d753938e5b8bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/ce84c386-50b5-4cbe-8f80-58a8297673e6.png?resizew=102)
A.![]() | B.1 | C.![]() | D.![]() |
您最近一年使用:0次
3 . 如图,在Rt
中,
,
,
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2023/3/2/3185819951472640/3188601109905408/STEM/d6ab05c2aa0f4e66b382f5bf7905ae21.png?resizew=115)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
![](https://img.xkw.com/dksih/QBM/2023/3/2/3185819951472640/3188601109905408/STEM/d6ab05c2aa0f4e66b382f5bf7905ae21.png?resizew=115)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-03-06更新
|
76次组卷
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3卷引用:湖南省常德市汉寿县2022-2023学年九年级上学期期末考试(第二次联考)数学试题
湖南省常德市汉寿县2022-2023学年九年级上学期期末考试(第二次联考)数学试题湖南省常德市2022-2023学九年级下学期开学考试数学试题(已下线)专题08 正弦、余弦和正切(六种考法)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(湖南专用)
4 . 如图,在菱形
中,对角线
,
交于点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/24625d20-f65c-459d-bb30-a777032638aa.png?resizew=163)
(1)求
的长;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/24625d20-f65c-459d-bb30-a777032638aa.png?resizew=163)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3281279fd172040eadc139ee61581a5a.png)
您最近一年使用:0次
5 . 在
中,
,
,若将
三边都扩大3倍得到
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171bba61008ab1d23730c46c1d9969d0.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c513dca3b8c31bc8d0ed4301e94cc1e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a2ccf448d0d8499a85092655a37309.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/156d51dcd94cf7c47d3397c112439c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171bba61008ab1d23730c46c1d9969d0.png)
您最近一年使用:0次
2023-03-01更新
|
176次组卷
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3卷引用:福建省宁德市2022-2023学年九年级上学期期末质量检测数学试卷(一检)
6 . 如图,在正方形
中,P是
边上的一点,且
,Q是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/4fc3bba0-4ddf-4b51-b3d2-cff3428121c8.png?resizew=112)
(1)求证:
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f6da0b38239da9ef2469ba21bd2ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/4fc3bba0-4ddf-4b51-b3d2-cff3428121c8.png?resizew=112)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb60f151b51a61956d838a17e2c61.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ac0bc4661057b8f2f0d8b5cf9d402a.png)
您最近一年使用:0次
2023-02-28更新
|
85次组卷
|
4卷引用:海南省儋州市2022-2023学年九年级上学期期末数学试题
海南省儋州市2022-2023学年九年级上学期期末数学试题(已下线)专题11 锐角三角函数及其运算(十种考法)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(北师大版)内蒙古自治区乌海市海勃湾区2022-2023学年八年级上学期期末数学试题(已下线)九年级数学开学摸底考(海南专用,范围:华东师大版九上+九下全部)-2023-2024学年初中下学期开学摸底考试卷
7 . 如图,
中,
,
,G是
的重心,
的中点为D,以G为圆心,
长为半径画⊙G,过C点作⊙G的两切线段
,其中E、F为切点,则
与
的度数和为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/7c12bbf2-b66a-4f2a-8ce9-43c307464a35.png?resizew=114)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aef101d4dadcfe59be543f7504aa62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bec9ca32fdbc25ddacf2f0de74c23b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e47634c8bc677c86728a212247896b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4e2cb3ae71a29f7134e471b5e02837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1da12b51149bf0b494d8124e20489e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300c70a78c1bea9fd86f4f1b0270e069.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/7c12bbf2-b66a-4f2a-8ce9-43c307464a35.png?resizew=114)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-02-24更新
|
289次组卷
|
4卷引用:江苏省无锡市东林集团2022-2023学年九年级上学期期末数学试题
江苏省无锡市东林集团2022-2023学年九年级上学期期末数学试题江苏省无锡市2022-2023学年九年级上学期期末数学试题江苏省连云港市新海初级中学2022-2023学年九年级下学期3月月考数学试题(已下线)专题12选择压轴题(精选60道)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)
8 . 在
中,
,若
的三边都放大2倍,则
的值( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
A.缩小2倍 | B.放大2倍 | C.不变 | D.无法确定 |
您最近一年使用:0次
2023-02-23更新
|
129次组卷
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4卷引用:湖南省岳阳市城区2022-2023学年九年级上学期期末教学质量监测数学试题
湖南省岳阳市城区2022-2023学年九年级上学期期末教学质量监测数学试题湖南省岳阳市岳阳楼区2022-2023学年九年级上学期期末数学试题湖南省岳阳市岳阳县2023-2024学年九年级上学期期末数学试题(已下线)专题01 锐角三角函数和特殊角的三角函数(六大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(浙教版)
9 . 在
的网格中,每格小正方形的边长都是1,若
的三个顶点都在相应格点上,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a01b58184ef17d47645f361dcd5b187c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf01cce24cae39fa27acb2d0d7c5f4c5.png)
您最近一年使用:0次
2023-02-21更新
|
273次组卷
|
3卷引用:河北省石家庄地区2022-2023学年九年级上学期期末考试数学试题
名校
10 . 如图,在边长为1的小正方形网格中,点A,B,C,D都在这些小正方形的顶点上,
,
相交于点O,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/f047d1aa-11e6-433c-9e87-76ea8094259e.png?resizew=264)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065ee5d91403f592f9b8d672ecfbcd0e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/f047d1aa-11e6-433c-9e87-76ea8094259e.png?resizew=264)
A.![]() | B.2 | C.![]() | D.![]() |
您最近一年使用:0次
2023-02-21更新
|
395次组卷
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4卷引用:安徽省宣城市2022-2023学年九年级上学期数学期末调研试题