如图,
是⊙
的直径,弦
于
,点
在弧
上(不含端点
), 连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460b3e6c33f202de6cbc7bd912f372c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7fe89d7f8828f6d76dbfd167bb881e4.png)
![](https://img.xkw.com/dksih/QBM/2019/7/15/2247261698293760/2248633744547840/STEM/426395a437614e8d98234b250b11b477.png?resizew=102)
(1)图中有无和
相等的线段,并证明你的结论.
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460b3e6c33f202de6cbc7bd912f372c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7fe89d7f8828f6d76dbfd167bb881e4.png)
![](https://img.xkw.com/dksih/QBM/2019/7/15/2247261698293760/2248633744547840/STEM/426395a437614e8d98234b250b11b477.png?resizew=102)
(1)图中有无和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c350ea9b36f4eb17d1a4fed348bbb8ed.png)
更新时间:2019-07-17 09:19:58
|
相似题推荐
解答题-证明题
|
容易
(0.94)
【推荐1】如图所示,已知
为⊙
的直径,
是弦,且
于点
,连接AC、OC、BC.
(1)求证:
;
(2)若
,
,求⊙
的直径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4163013ce2054e7deaa65ff70561b4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c10f399616b60b4fb352b271f8b4bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/64ef86d3-f80d-4c14-a81a-0b2e31630778.png?resizew=126)
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【推荐2】如图,
为
的直径,弦
于点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/12/77858af0-1084-4057-85f8-344a739dd98a.png?resizew=131)
求
的半径;
求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de269556fb00e1f2d8b19d1a44317d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd4dfab055b79985a9e365c26f524af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/12/77858af0-1084-4057-85f8-344a739dd98a.png?resizew=131)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
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【推荐1】如图,四边形ABCD是
的内接四边形,DB=DC求证:∠CAD=∠EAD..
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edbe289ad89a4243903108709ce0381.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/41e10af9-5d8e-4376-ac2c-279ad778e1a1.png?resizew=132)
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【推荐2】如图,A,P,B,C是
上的四个点,
.求证:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991fdca41f19de62f60e293c3756aee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-计算题
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【推荐1】(1)计算:
.
(2)如图,在Rt△ABC中,∠C=90°,BC=5,AC=12,求∠A的正弦值,余弦值和正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f71d54742da645d2aba07f1651e55d.png)
(2)如图,在Rt△ABC中,∠C=90°,BC=5,AC=12,求∠A的正弦值,余弦值和正切值.
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833493952831488/2835048669528064/STEM/1cdc1897-b66f-466a-b4c7-3c8a3ebe3dbb.png?resizew=234)
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【推荐1】图①、图②、图③都是5×5的正方形网格,每个小正方形的顶点称为格点,每个小正方形的边长均为1,请在所给网格区域(含边界)上按要求画格点三角形.
(1)在图①、图②中分别画一个△PAB,使△PAB的面积等于4(所画的两个三角形不全等).
(2)在图③中,画一个△PAB,使tan∠APB=
.
(1)在图①、图②中分别画一个△PAB,使△PAB的面积等于4(所画的两个三角形不全等).
(2)在图③中,画一个△PAB,使tan∠APB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://img.xkw.com/dksih/QBM/2020/3/9/2415708559843328/2415951596421120/STEM/1608939cac974ae2a870625cc4a63b7c.png?resizew=405)
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