(1)计算:
.
(2)如图,在直角
中,
,
,
,求边
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8418d4030e0300872d5979b63a7103b3.png)
(2)如图,在直角
![](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/0564a858de34c8a22f3602be8fdca521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e0c5cb53fd85b7a23f0580df6bb49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/ce37bb87-98aa-447b-ac33-9ce57aac0330.png?resizew=143)
更新时间:2024-03-13 14:14:50
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【推荐1】如图,在
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解答题-应用题
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较易
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名校
【推荐2】如图为某影院的剖面图,水平地面
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到B处,入座后,眼睛D观察屏幕最高处仰角为
,屏幕最低处俯角为
.
(1)小丽从A处走到B处,沿垂直方向上升了几米?
(2)求屏幕
的高度?(
,
,
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,结果精确到
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e5713e183b1249046e6e9139108c59.png)
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(1)小丽从A处走到B处,沿垂直方向上升了几米?
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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