1 . 若直线
与
轴所夹的锐角为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc81cfaccc00aa4b7139de5a35a102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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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.![]() |
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3 . 如图,四边形
为平行四边形,以
为直径的
交
于点
,连接
,
,
,
.过点
作直线
.过点
作
,垂足为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/63f227cb-4fcd-439c-8376-385a66b0e443.png?resizew=241)
(1)求
的值;
(2)若
,且
与
交于另一点
,求
的长;
(3)过点
作
,垂足为
,当直线
绕点
旋转时,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441a92c002129b752085f041139e2e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19338598965bb3856cdd0236bbf694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead1eda1ca5b67586379a09a4c3540b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588c2189e1c48047b334d29da53e7727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/63f227cb-4fcd-439c-8376-385a66b0e443.png?resizew=241)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4efc9ce6b0f7f5e1a3b3e69b6874385b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7651e0d70a6b02e6914f28e2b4021c16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e296c176f79b449f14ab19b527d473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a671e58f28e9e5e2122c4f63401a2923.png)
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4 . 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.![]() |
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2023-03-06更新
|
76次组卷
|
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)
5 . 如图,已知
,且
三边满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b9a53e552116848849b76dab92d0ac.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/fac01cf0f149993b39d9f64c578163dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b9a53e552116848849b76dab92d0ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/510855ad-809e-43e6-8e68-9947124c81ad.png?resizew=123)
您最近一年使用:0次
2023-02-28更新
|
90次组卷
|
2卷引用:四川省宜宾市叙州区2022-2023学年九年级上学期期末数学试题
6 . 如图所示,在边长相同的小正方形组成的网格中,两条经过格点的线段相交所成的锐角为
,则夹角
的正弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
2023-02-28更新
|
75次组卷
|
3卷引用:山东省淄博市张店区2022-2023学年九年级上学期期末数学试题
7 . 如图,∠AOB是放置在正方形网格中的一个角,其中点A,B,O均在格点上,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/f4eb3105-b9b1-4ef4-9bbb-8bbda9b90c09.png?resizew=117)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6657321b25670efdc7286ca578430f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/f4eb3105-b9b1-4ef4-9bbb-8bbda9b90c09.png?resizew=117)
A.![]() | B.1 | C.![]() | D.![]() |
您最近一年使用:0次
8 . 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)
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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
9 . 在正方形网格中,
的位置如图所示.则
的值为( )
![](https://img.xkw.com/dksih/QBM/2023/2/22/3180280448245760/3183976224309248/STEM/ece685a6910945e09e3b15c80f09504e.png?resizew=134)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://img.xkw.com/dksih/QBM/2023/2/22/3180280448245760/3183976224309248/STEM/ece685a6910945e09e3b15c80f09504e.png?resizew=134)
A.1 | B.![]() | C.![]() | D.![]() |
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10 . 在
中,
,若
,则
的值为______ .
![](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/d20befb31b8e0deb0604491ab8ab7cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1311f32edf13f8caee5edb03f24a7ba.png)
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