如图,AB为一斜坡,其坡角为19.5°,紧挨着斜坡AB底部A处有一高楼,一数学活动小组量得斜坡长AB=15m,在坡顶B处测得楼顶D处的仰角为45°,其中测量员小刚的身高BC=1.7米,求楼高AD.(参考数据:sin19.5°≈
,tan19.5°≈
,最终结果精确到0.1m).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137cf59078a63a7eed84fbcc223794c1.png)
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220489615589376/2223199249711104/STEM/d8f33ea9613a455fbd56c0090546230f.png?resizew=141)
更新时间:2019-06-11 10:53:21
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【知识点】 仰角俯角问题(解直角三角形的应用)
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,小明的家在某住宅楼
的最顶层,他家对面有一建筑物
,他很想知道建筑物的高度,他首先量出
到地面的距离
为
,又测得从
处看建筑物底部
的俯角
为
,看建筑物顶部
的仰角
为
且
,
都与地面垂直,点
,
,
,
在同一平面内.
![](https://img.xkw.com/dksih/QBM/2020/10/31/2583113604284416/2585835669643264/STEM/6f4d875221504b75a0ee56f4fb9a09b0.png?resizew=120)
(1)求
与
之间的距离(结果保留根号);
(2)求建筑物
的高度(结果精确到
).
参考数据:
,
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/c1a7c635a62b00de7f522a4f9508465c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c8821523ca7f9b95357aeb07f3e7c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903c1bb6f9fe8f9b9710683a3e601452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2020/10/31/2583113604284416/2585835669643264/STEM/6f4d875221504b75a0ee56f4fb9a09b0.png?resizew=120)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求建筑物
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef959a420dc4a40d40e1960a68d1acce.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d2082b0e4e457c2ea1e033d69d8b39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b15906c24c41d13588f3c4b5e19086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476738939000cc9e73bc8035fbdd8676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7ff6bb8000946da9599d7d903ac9a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在某信号塔
的正前方有一斜坡
长为12米,坡顶
与水平地面
的距离为6米,
为8米,小明从底端D沿斜坡行走8米后到达点E处,并在点E处测得塔顶的仰角
,且
,
(点A,B,C,D,E,K,N在同一平面内).(
,
,
,
)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2972987740037120/2979393519501312/STEM/abce1437-b982-4281-891a-72ba116600cf.png?resizew=209)
(1)求∠D的度数;
(2)求信号塔
的高度.(结果精确到1米)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ebffbdca89cc68c33706ab069fc6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9305ea54656005d776815fdda11ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ce5b5c0f7839868c3503ab765dd0e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8152658c4eaf5a7254df12a88219a504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ac8704f53183c9610f3f702571dbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4cf8f33da5150cc0925cf0cf1cb29f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7ff6bb8000946da9599d7d903ac9a.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2972987740037120/2979393519501312/STEM/abce1437-b982-4281-891a-72ba116600cf.png?resizew=209)
(1)求∠D的度数;
(2)求信号塔
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-计算题
|
适中
(0.65)
【推荐3】上蔡奎星楼位于上蔡故城东垣上,始建于西汉年间,奎星楼共有三层,为砖木结构,拱角飞檐,六棱菱形.每层都有雄峙的翅角向上,顶层塔尖为独具风格的葫芦顶.每块砖和大门之上,雕刻着古代戏剧人物,与楼顶五颜六色的琉璃筒瓦、飞鸟走兽、怒龙奋爪相映辉.远远望去,雄武多彩.小刚站在奎星楼前C处测得奎星楼顶A的仰角为53°,小强站在对面的居民楼上的D处测得奎星楼顶A的仰角为45°,此时,两人的水平距离EC为1m,已知小强所在的高度DE为2m,根据测得的数据计算奎星楼AB的高度.(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76fe9cc87f8e8389c94efa7e7caab2a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad548d3bb499aab6d0baf4032be99bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96c73b975439785d8919dfc317cd2e9.png)
![](https://img.xkw.com/dksih/QBM/2022/1/1/2891694421729280/2949543079804928/STEM/0194c41d-b863-49b7-b6fe-df7190b5f99f.png?resizew=431)
您最近一年使用:0次