如图,扇形
所在圆的半径为2,它所对的圆心角为
,
为弧
的中点,动点
,
分别在线段
,
上运动,且总有
,设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/acd803c8-04ea-4926-8d97-7bc5379d9123.png?resizew=138)
(1)若
,用
,
表示
,
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e20d6fe4fea186b697f6456cb7c6ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9cb32a25c2a8bb99f75633b4cd5ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049131856ba841523793ee3d83099014.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/acd803c8-04ea-4926-8d97-7bc5379d9123.png?resizew=138)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c11a7ce3d62a7c0ddcb8397ecec00d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754ff99a252a251da4b9b3db4912f57d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c114400276606307388adbd66f4cb3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de88a91424dad8dbb931c2278f06598.png)
更新时间:2020-03-02 21:21:09
|
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名校
解题方法
【推荐1】如图,G是△OAB的重心,P,Q分别是边OA、OB上的动点,且P,G,Q三点共线.
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(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36e78f5e4418360abda91b5371d2354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de250e2fc4d0740b0ec4b4f7fb99a61a.png)
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解答题-证明题
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适中
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【推荐2】如图,点O是平行四边形
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解答题-问答题
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适中
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【推荐2】在△ABC中,sin A∶cos B∶tan A=12∶16∶15.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3738bb3fced399273145e04ec3955b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f05b013e4b7166cbc87c5a83d6a85.png)
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解答题-问答题
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适中
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解题方法
【推荐2】在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1323d7e56423759b1e2c63b72d37fd7.png)
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