1 . 在某个位置测得某山峰仰角为θ,对着山峰在地面上前进600 m后测得仰角为2θ,继续在地面上前进200
m以后测得山峰的仰角为4θ,求该山峰的高度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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解题方法
2 . 在
中,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7112e7ccb1eb90facfa5182ea763970a.png)
____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f2f1eb2beb23690f56a68dc7da08cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d4bfd0ce98e23263e5fc752497b850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7112e7ccb1eb90facfa5182ea763970a.png)
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名校
3 . 在△ABC中,三边a,b,c成等差数列,B=30°,且△ABC的面积为
,则b的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
A.1+![]() | B.2+![]() | C.3+![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
358次组卷
|
3卷引用:2016-2017学年湖南益阳市箴言中学高二9月月考数学(文)试卷
4 . 如图,在凸四边形
中,
为定点,
,
为动点,满足
.
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/db488d4b17744163bfec3c7424447d8e.png)
(1)写出
与
的关系式;
(2)设△BCD和△ABD的面积分别为
和
,求
的最大值.
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/629dfbb8e77e4622903f7c4907fbc49a.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/b6886bb6822b4a07ac362aab8221519c.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/0018974718974bf9b70e3d74acb5e568.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/72141ef096d949319206b17df3a78227.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/47097739cd6643c2880f44dc29bcf750.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/db488d4b17744163bfec3c7424447d8e.png)
(1)写出
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/d68b971a5cca494b8b2b63788b26bc25.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/e0021defc3e24f8b96aa952de432d9a2.png)
(2)设△BCD和△ABD的面积分别为
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/ba2b484333df45b7a93aae8cdf8f6463.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/03d69acdb9f44b378748e806b02dc396.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568964608/STEM/c8cfd3e0f2024fcda9b69219198114e6.png)
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5 . 在
中,
,
,
,则![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568645120/STEM/938344ad463345b1a192e55a708fd297.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568645120/STEM/3947d7dd424941c89d0ac31e05971bb8.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568645120/STEM/aa22e8a1701f4c7e8b28a97de73b5c0a.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568645120/STEM/6df1849209cd4fe7a787a095cfe93d19.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568645120/STEM/a588219fb5d54c3db95965eddc103429.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568645120/STEM/938344ad463345b1a192e55a708fd297.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
6 . 在
中,
,则![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568505856/STEM/ad8ad40b7a104539af43931485aa179d.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568505856/STEM/ab96b4a6664248a0ad35967b277d2010.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568505856/STEM/9a54ecf85d554ae2a197d5f4256618be.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573121562648576/1573121568505856/STEM/ad8ad40b7a104539af43931485aa179d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 函数
的最小正周期是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5978f033670b9296336935915f016579.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 已知
是半径为2的圆的内接三角形,内角
的对边分别为
,且
.
(Ⅰ)求
;
(Ⅱ)若
,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/74a7a00c8e8893e7d958369705d4852e.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0995351888250bd5c55fb849a8b9c6ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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9 . 三角函数
的振幅和最小正周期分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1173415a4769fbbbc39ce3b8ca53be3.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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10 . 已知角
的终边经过点
,则
的值为____________.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572957154795520/1572957160636416/STEM/6fd2f3a24d374c328fce3ac8a54c99d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccf16f88daa7861a382d3f656da10d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578853e3cd49b1a7c80ab6d1e507ba22.png)
您最近一年使用:0次
2016-12-04更新
|
605次组卷
|
2卷引用:湖南省益阳市第十五中学2020-2021学年高一上学期12月质量检测数学试题