名校
解题方法
1 . 如图所示,为了测量山顶古塔的高度
,在地面上
点处测得古塔底部
的仰角为
沿直线
为山的底部,
在地面平面内,三点不共线)前进
米到达
点处,测得古塔顶
的仰角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/511110951e4e9a3a5dc4fc07461e617f.png)
,则古塔高
( )
![](https://img.xkw.com/dksih/QBM/2021/11/22/2857011026214912/2858485458870272/STEM/27d003f72b9f4f6a870e75cd75c71b8b.png?resizew=339)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c596eef62534d006d6a6c981946b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290b884d1dd1c199ce9314d3f99714b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](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/511110951e4e9a3a5dc4fc07461e617f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2946e727f5f7463ec39ddf71920f46fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
![](https://img.xkw.com/dksih/QBM/2021/11/22/2857011026214912/2858485458870272/STEM/27d003f72b9f4f6a870e75cd75c71b8b.png?resizew=339)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2021-11-26更新
|
159次组卷
|
2卷引用:全国百强名校“领军考试”2021-2022学年高二上学期期中考试文科数学试题
名校
解题方法
2 . 下列说法中正确的个数是( )
(1)命题“所有幂函数f(x)=xα的图象经过点(1,1)”
(2)“在
ABC中,若sinA>sinB,则A>B”的逆否命题是真命题
(3)若非零向量满足
,则
与
的夹角为锐角
(4)命题“∀x>0,2020x+2021>0”的否定是“∃x0≤0,
”
(5)命题“a,b∈R,则a2+b2≥4是|a|+|b|≥2的充分不必要条件”
(1)命题“所有幂函数f(x)=xα的图象经过点(1,1)”
(2)“在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(3)若非零向量满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7810b926dfb892d725d12b9c30796e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
(4)命题“∀x>0,2020x+2021>0”的否定是“∃x0≤0,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4658a14006f3a15f0bf70089b82b67.png)
(5)命题“a,b∈R,则a2+b2≥4是|a|+|b|≥2的充分不必要条件”
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
2021-09-30更新
|
332次组卷
|
2卷引用:河南省信阳高级中学2021-2022学年高二上学期9月月考数学(理)试题