如图,山坡
的坡度
(指铅直高度
与水平宽度
的比),在山坡
上发现有一棵古树
.测得古树底端
到山脚点
的距离
米,在距山脚点
水平距离4米的点
处,测得古树顶端
的仰角
(古树
与山坡
的剖面、点
在同一平面上,古树
与直线
垂直),求古树
的高度.(结果精确到0.1米;参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1852175af2bff405159bc6b574dcb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6f3d14d4c0d628472a0b5dbd603f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0078faabbd1bc0a947f136ad0f839f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5185829b2404464db75bdbc0096af3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/973517a0c9266ca06df20764d87a6f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74cb12072317fccbc5af1e6101777a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/5/31/2732782370947072/2733702005530624/STEM/9f7d3c73-3a79-49a2-8708-6070e2e7dda5.png)
更新时间:2021-06-01 17:13:52
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
为
的直径,点C、D为
上两点,且点D为
的中点,连接
、
、
,过点D作
于点F,过点D作
的切线
,交
的延长线于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/c9221e59-365c-42c0-b175-2a0f48e4cbf5.png?resizew=123)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa30a9ee227af2b387cf6e028c20d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/c9221e59-365c-42c0-b175-2a0f48e4cbf5.png?resizew=123)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032b3e422eeb39cf649dffc9934a7cf0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c85409e4c685f7dbadae2de3cf9a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f951e874c46b9ee8ac55914f0ee5a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,直线AB与反比例函数的图象交于
,
两点,点C在x轴上,
,
的面积为8.
(2)求
的面积;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7644daed7441dc50b296de6fea56120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2c254a6b8c7d07a223af8bc1e045ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb0cb135b77b10612f470c5035dabd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173bc7a36757d77f01213411edd25241.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe192a424fcc108fa6a0e986fd91a6d.png)
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解答题-证明题
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适中
(0.65)
【推荐3】在△ABC中,CA=CB,∠ACB=α,D为△ABC内一点,将△CAD绕点C按逆时针方向旋转角α得到△CBE,点A,D的对应点分别为点B,E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/8ad5d6a8-87c6-4f54-a203-d8640a7961eb.png?resizew=183)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/d2b59b43-213b-4401-bf1a-ff91a62213bd.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/2c4d8b8a-fbb5-4dc2-828b-cedaf1061564.png?resizew=171)
(1)如图1,若A,D,E三点在同一直线上,则∠CDE= (用含α的代数式表示);
(2)如图2,若A,D,E三点在同一直线上,α=60°,过点C作CF⊥AE于点F,然后探究线段CF,AE,BE之间的数量关系,并证明你的结论;
(3)图3中,若CA=2
,CD=2,将△DCE绕点C旋转,当 时,△CAD的面积最大,最大面积是 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/8ad5d6a8-87c6-4f54-a203-d8640a7961eb.png?resizew=183)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/d2b59b43-213b-4401-bf1a-ff91a62213bd.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/2c4d8b8a-fbb5-4dc2-828b-cedaf1061564.png?resizew=171)
(1)如图1,若A,D,E三点在同一直线上,则∠CDE= (用含α的代数式表示);
(2)如图2,若A,D,E三点在同一直线上,α=60°,过点C作CF⊥AE于点F,然后探究线段CF,AE,BE之间的数量关系,并证明你的结论;
(3)图3中,若CA=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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解答题-应用题
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【推荐1】如图,小明为了测量小河对岸大树
的高度,他在点A测得大树顶端B的仰角为
,沿斜坡走
米到达斜坡上点D,在此处测得树顶端点B的仰角为
,且斜坡
的坡比为
.(参考数据:
,
,
)
(2)大树
的高度约为多少米?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d52429c8324350309f77e7209a5c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7451b9d94e28503b8ac931632ff9dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9276f5c80582d75a9731f68947c5d08f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a91fa163ba018df2dcf31e86f10180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c114c8734f0d064de64d8457655a980c.png)
(2)大树
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】如图,某商厦AB建在一个高台上,商厦AB前是一个长度为BC的平台,为方便顾客,商厦修建了坡度为30°的台阶CD,小明在与A,B,C,D同一平面的点E处观测到点A的仰角为57°,已知BC=10米,CD=20米,DE=15米,求商厦AB的高度.(结果保留一位小数,参考数据:sin57°≈0.84,cos57°≈0.54,tan57°≈1.55,
≈1.73)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2021/4/23/2705900713050112/2706590947614720/STEM/5b1284dbc1bd4a8c8276d5cbfb9c2bae.png?resizew=167)
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解答题-问答题
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【推荐1】“蘑菇石”是我省著名自然保护区梵净山的标志,小明从山脚B点先乘坐缆车到达观景平台
观景,然后再沿着坡角为
的斜坡由E点步行到达“蘑菇石”A点,“蘑菇石”A点到水平面
的垂直距离为
.如下图,
,
,
,求斜坡
的长度.(结果精确到
,
,
,
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707d14deed56ff2667c9ddaeef35ebf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512e5a82b9614caf1bb1a959bad8193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff806f691211bb50acda1329ac1b8c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b8b22f4966a1f05fb368325f4d8f705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaa19eeaf415ed419e77fe92794f443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34c62a201970bda6ff4d2336fb34113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9c7a7889c9a5b340e07e044cfee5b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67e5971489e312069222c1ba6c4f67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1c8568466650023721e5818c12252a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae9905d876d462bf56194381bc1b031.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/23/65c7ca78-50da-4ddd-9e60-fcab0cfd4017.png?resizew=137)
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真题
名校
【推荐2】如图1所示,某登山运动爱好者由山坡①的山顶点A处沿线段
至山谷点
处,再从点
处沿线段
至山坡②的山顶点
处.如图2所示,将直线
视为水平面,山坡①的坡角
,其高度
为0.6千米,山坡②的坡度
,
于
,且
千米.
的度数;
(2)求在此过程中该登山运动爱好者走过的路程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a07657d5498fc951edb413f514eac44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d9b09e40e99b7b130dd12a8591962f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076056d278749c4cadf4b7cd08373f40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfe7abd4f0f6b37c3a64ca6d3e534b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(2)求在此过程中该登山运动爱好者走过的路程.
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