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1 . 某商场零食区改造,如图,原零食区是区域
,改造时可利用部分为扇形区域
,已知
,
米,
米,区域
为三角形,区域
是以
为半径的扇形,且
.
外轮廓地面贴广告带,求广告带的总长度;
(2)在区域
中,设置矩形区域
作为促销展示区,求促销展示区的面积
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0947161887af7b78afde80c0cd647d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d276b69c758da6bf9e2fb7f63130bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab51246d895d2a255f3314c853000ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdcc8f70e441df3433765f5218c81c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb802b0cd77d772dceff0d9ff6c879ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81cbbac19ce207b72c990195854f6fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
(2)在区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d276b69c758da6bf9e2fb7f63130bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e5c1767a5719a03062ebb0fc5067b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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2 . 如图,在三棱柱
中,正方形
的棱长为2,
,点M为AB中点,
.
为直三棱柱;
(2)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c645d1dea7ca8a6eb931635dcf63d6f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4149c3692068ea18563a4ef56d9d1cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ef601ca1f9c4c031adab4ffed297f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e363082228a653eb5b0dbc3c6161a9c9.png)
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3 . 已知双曲线
的左焦点为F,P为渐近线位于第一象限内的点,过原点O作直线AB平行于FP, 交双曲线于A,B两点,四边形FPBA为矩形,则该双曲线的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
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4 . 已知两个正四棱锥
与
均内接于球
,满足
和
,则球
的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c6caa0455442437177ab9b995df37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50488f7443c0b740ed0b645c519e4e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6834ac70927ae08d7d36a1922403c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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5 . 若
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21578ec63012d8c7bb3bdd3b47eeae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059d6df06a5b85848dc4fa33327f8e07.png)
A.![]() | B.![]() | C.1 | D.![]() |
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6 . 记
的内角A,B,C的对边分别为a,b,c,
,则角
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056c511ce749bdb7b0ead815aff8afe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26308ea6d8f321d27acbd7f9b131f9f1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 函数
(
为自然函数的底数)的图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e601148e769419c72379419477c373ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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8 . 已知
中,角
所对的边分别为
,
,
,
,若
,则
的最小值为_________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95d62b9a1fc994c972781c7013fedba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1b5305cb9b5a90c4f13bceaaee4fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68918379531894442f55c7257549ea33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c4807435a3e91de8aba99db62e23bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0987a20a5648765bce6ae78a693106.png)
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9 . 已知四棱锥
的各顶点在同一球面上,若
,
为正三角形,且面
面
,则该球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc4d546ee9c19e7ea16f90595b887d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 已知三棱锥
中,
,则三棱锥
的外接球的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75dc5b9679ae83920b94dbdfd14b0648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb2ef23b58197aa5957a312a7415f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75dc5b9679ae83920b94dbdfd14b0648.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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