1 . 如图,某人在河南岸的点A处,想要测量河北岸的点
与点A的距离,现取南岸一点
,得
,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/2e36cdde-3150-4640-9b01-191d005619fe.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15947f9f2cd8a7aa37728f44f8fbc114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c3002335e287111602d47264d68323c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/2e36cdde-3150-4640-9b01-191d005619fe.png?resizew=158)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 如图,直线
,
,
,
为线段
上一点,且
,点
、
分别为直线
、
上的点,且
,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/3434e414-12b8-4e66-b95d-5e9d1b008dac.png?resizew=154)
(1)当
,求
的面积
;
(2)用
表示
的面积
,并求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e03566282ef39ad17821036f228174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd2d246f0850db73fe2e6b1e26eb549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.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/ecbb2dce15f3d0fe839688575d2a8ff8.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/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add60595ecea5d00ff1fbb2a5409be73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548edcb48a64ab7570e9195a39bed656.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/3434e414-12b8-4e66-b95d-5e9d1b008dac.png?resizew=154)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c96cb3ac8290e09c55d4eb336a8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de0022a7f2e122492f1483e4d3cccba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e9e650e76d84f709d26f7b7274dadc.png)
(2)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de0022a7f2e122492f1483e4d3cccba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd7229922fbb3ce09dada883f74fbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd7229922fbb3ce09dada883f74fbb1.png)
您最近一年使用:0次
解题方法
3 . 在
中,若
,则最大角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15cb0f57dd1cc8dd7675eaa68fef7d8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
4 .
分别为
内角
的对边.已知
.
(1)求
;
(2)若
为钝角,且
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](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/a495a7b1e61065ee7ae0850d2bfafd0f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f590304526a01d93473193287ed4b00f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526d1c1f892971b9398ba764356dec3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-11-16更新
|
631次组卷
|
2卷引用:甘肃省兰州市兰州一中2023年普通高中合格性考试数学模拟试题
名校
5 . 为了测量一座底部不可到达的建筑物的高度,复兴中学跨学科主题学习小组设计了如下测量方案:如图,设A,B分别为建筑物的最高点和底部.选择一条水平基线HG,使得H,G,B三点在同一直线上,在G,H两点用测角仪测得A的仰角分别是
和
,
,测角仪器的高度是h.由此可计算出建筑物的高度AB,若
,则此建筑物的高度是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e8cfc92fac8debb8bc06293ccc1685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d04160c1833116283ecffff8dacd88.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-11-06更新
|
652次组卷
|
7卷引用:2023年湖北省普通高中学业水平合格性考试数学试题
2023年湖北省普通高中学业水平合格性考试数学试题(已下线)第六章 本章综合--方法提升应用【第三练】“上好三节课,做好三套题“高中数学素养晋级之路江苏省江阴市华士高级中学2023-2024学年高一下学期3月学情调研数学试题内蒙古自治区乌海市第一中学2023-2024学年高一下学期第一次月考(4月)数学试题(已下线)9.2 正弦定理与余弦定理的应用-【帮课堂】(人教B版2019必修第四册)黑龙江省哈尔滨市第二十四中学校2023-2024学年高一下学期4月月考数学试题山东省泰安市泰山中学2023-2024学年高一下学期3月月考数学试题
名校
6 . 在
中,内角
所对的边分别为
,
,
,已知已知
.
(1)求角
的大小;
(2)若
,
,求
的值;
(3)若
,判断
的形状.
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3371592e18d2764183bd1f04874f55fe.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a99bb77a5ec8629e26b0329a8a21db2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-09-24更新
|
4484次组卷
|
10卷引用:甘肃省庆阳市宁县第一中学2023-2024学年高二上学期合格性考试模拟数学试题(一)
甘肃省庆阳市宁县第一中学2023-2024学年高二上学期合格性考试模拟数学试题(一)吉林省辽源市田家炳高级中学校2022-2023学年高一下学期第二次质量检测数学试题贵州省遵义市桐梓县荣兴高级中学2023-2024学年高二上学期第四次月考数学试题(已下线)专题11 余弦定理-【寒假自学课】(苏教版2019)(已下线)6.4.3 第1课时 余弦定理【第一练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)专题11.1余弦定理-重难点突破及混淆易错规避(苏教版2019必修第二册)广东省东莞市嘉荣外国语学校2023-2024学年高一下学期3月月考数学试卷陕西省宝鸡市扶风县法门高中2023-2024学年高一下学期第一次月考数学试卷四川省眉山市仁寿第一中学校南校区2023-2024学年高一下学期4月期中考试数学试题广东省梅州市梅县区丙村中学2023-2024学年高一下学期3月月考数学试卷
7 . 如图,在直角
中,
,
为
上的点,
为
上的点,若
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb75566ad4dd9eb2336ba416fe57f57.png)
__________ .
![](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/8455657dde27aabe6adb7b188e031c11.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3df3384f0f55b67ee9cf42f75e34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0be186da1b75b78aa39b8cdbe9438a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d30cd3e53a9df24fe6da5e8a3a7ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432cce1481829c4dfe2bd557f6e9aa4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb75566ad4dd9eb2336ba416fe57f57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/6/264d58b9-6978-4350-8715-17d3c44c20ee.png?resizew=175)
您最近一年使用:0次
解题方法
8 . 已知
的三个内角的正弦值分别等于
的三个内角的余弦值,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() ![]() |
您最近一年使用:0次
解题方法
9 . 如图,网格中每个小正方形的边长为1,现将一个三棱锥的侧面展开图剪切后放置其中,则该三棱锥的表面积是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/14/533a284e-6c48-4216-933f-04d58c0e15c2.png?resizew=152)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 在
中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b86d43790babcdbbdc03493ee70928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e29b822cda1ba926e96368094fa1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
您最近一年使用:0次
2023-08-10更新
|
507次组卷
|
3卷引用:2023年天津市南开区普通高中学业水平合格性考试模拟数学试题