2024·全国·模拟预测
解题方法
1 . 记
的内角
的对边分别为
,
,
.
(1)求
;
(2)若点
在边
上,且
,
,求
的面积.
![](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/4295d2bd5ed97a1d57ef84b6bf522430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f1dae5d3fc87bc555245137a1a455e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdb56686128f5c3cd2a46bab09082e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeac1c6b607329ad9be8f1fc02073d99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2 . 正五角星是一个非常优美的几何图形,其与黄金分割有着密切的联系,在如图所示的五角星中,以
为顶点的多边形为正边边形,设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae0c3a889da94fd660aa8dc57e25b38.png)
________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13285b04c6606d0af14d148e344ff93e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d75df9d80ce1e0b7cb50464e293864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae1b2a249841cb942fea24811feda9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae0c3a889da94fd660aa8dc57e25b38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13285b04c6606d0af14d148e344ff93e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/22/2e3852b0-2d69-4bda-994f-6edb4bd2b582.png?resizew=128)
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2024-05-19更新
|
768次组卷
|
4卷引用:河北省邯郸市2024届高三下学期学业水平选择性模拟考试数学试题
河北省邯郸市2024届高三下学期学业水平选择性模拟考试数学试题河北省邯郸市2024届高三第四次调研监测数学试题辽宁省辽阳市2023-2024学年高三下学期二模数学试卷(已下线)第五套 艺体生新高考全真模拟 (二模重组卷)
2024·全国·模拟预测
解题方法
3 . 在平面直角坐标系中,若角
的顶点为原点,始边为
轴非负半轴,终边经过点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30fb45e6002c63ec6836ad7237dc35e0.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132c30ea68aa40630eb1b86e4f607b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111fc953684b51df437ef2bc02290ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30fb45e6002c63ec6836ad7237dc35e0.png)
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解题方法
4 . 在
中,
,
是方程
的两个根,则
的值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac188a1a6638460b9860cf2227a6afc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2024·全国·模拟预测
5 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9e4093fce7ee69e58ee82536f95d84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ec7c99202b44d5d65239f65f155b6f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024·全国·模拟预测
解题方法
6 . 已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5caabda288fc01cc168938846eec5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e06239fce96cbd3f5dd33776fbb6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17259c423fead1507ce60353614c951.png)
A.![]() | B.![]() | C.![]() | D.13 |
您最近一年使用:0次
名校
解题方法
7 . 古希腊数学家毕达哥拉斯通过研究正五边形和正十边形的作图,发现了黄金分割率,黄金分割率的值也可以用
表示,即
,设
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7116200edf5a29de6ca5f95ab92ba9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f443caea57a63e0d244a4e7d9d92bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8382dcdb655ab1d049f8dba22fa467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66761bd69451a758a760d4ccad119ab8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-04-08更新
|
480次组卷
|
4卷引用:模块3 第4套 全真模拟篇(一模重组卷)
(已下线)模块3 第4套 全真模拟篇(一模重组卷)(已下线)4.3 二倍角的三角函数公式-同步精品课堂(北师大版2019必修第二册)江西省部分高中学校2024届高三下学期3月联考数学试卷黑龙江省齐齐哈尔市恒昌中学校2023-2024学年高一下学期4月月考数学试卷
8 . 已知
,
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25346fee343c5dd6a37e7fd3b0653045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68efb486c053bb4f2d058d860f9d124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e8194abec35df18bf6be18c773eeec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8b00ef8d1097d078488f89a12f7bf4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
9 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14426ddfe07b23cd1e0410f03564c860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c01a70aa1077e628ea9e0bb7380b14.png)
A.![]() | B.![]() ![]() | C.![]() ![]() | D.![]() |
您最近一年使用:0次
2024-02-28更新
|
347次组卷
|
2卷引用:1号卷·2022年高考最新原创信息试卷(二)理数
名校
解题方法
10 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10583ddbfee1ffdf8360dabc3b509430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cafeb698353b355f29eae574be4ba8d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次