1 . 如图,直线
,
与
互补,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/6f74afe5-26d2-430d-ab75-c5a6bfa92487.png?resizew=198)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027830fc47290062692964077ee481e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9693da3141d4af5e8deb0fd17dd5aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/6f74afe5-26d2-430d-ab75-c5a6bfa92487.png?resizew=198)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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2 . 重庆风景区内高台BC上有一座古塔AB.如图,小明在景区大门E处测得古塔AB的顶端A的仰角为45°,接着他沿着坡度为1:2.4的斜坡EC走了104米到达坡顶C处,到C处后继续朝古塔AB的方向前行50米到D处,在D处测得A的仰角为71°,则此时小明距古塔的距离BD约为( )米.(结果精确到0.1米,参考数据:sin71°≈0.95,cos71°≈0.32,tan71°≈2.90)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/cf0a824d-c7cf-48d4-b798-734635a56a8b.png?resizew=135)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/cf0a824d-c7cf-48d4-b798-734635a56a8b.png?resizew=135)
A.55.5 | B.55.8 | C.56.1 | D.56.4 |
您最近一年使用:0次
2021-07-30更新
|
232次组卷
|
2卷引用:重庆实验外国语学校2020-2021学年九年级下学期第二次诊断性考试数学试题