解题方法
1 . 已知函数
.
(1)求函数
的最小正周期;
(2)在锐角三角形
中,角A、B、C所对的边分别为a、b、c,若
,
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e449d602223d82847e9a6c11cda0302.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)在锐角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69def215d32ff6734ad883a0ca260a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36ec31cfd615abfbee3ed2f4a1d8883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2 . 若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782ec280b03ba061865e40c275c7d0a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a079bbb9ad543f1fb48475d44dc99298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ec7c99202b44d5d65239f65f155b6f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-11-28更新
|
454次组卷
|
2卷引用:江西省宜春市高安市灰埠中学2023-2024学年高二上学期期中数学试题
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3 . 已知
,函数
在
单调递减,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc172d0f9bb8cec2ac74576d46bc8038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1e477673a8d9bc3763ff25b1cb7e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
4 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055a7d34494f4a25a4364f6667e7dbda.png)
,
是函数
的两个零点,且
,当
时,
最小值与最大值之和为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055a7d34494f4a25a4364f6667e7dbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ddbb5cfaedab59c97125105c3fe590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec183597403a7e7c8a0b93991aae3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6efc9d3d7790cbc990483cbe23d9ef50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f96e44f2135bfaef26ea938831d5c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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5 . 设函数
.
(1)求函数
的最小正周期和单调递增区间;
(2)当
时,
的最小值为2,求函数
的最大值及对应的
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f3c466fc2fe22ed23ff0311c6dcd6a.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafce249be1aeee0581417db4ce841db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2023-11-21更新
|
640次组卷
|
2卷引用:上海市松江区第四中学2023-2024学年高三上学期期中学情诊断数学试题
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解题方法
6 . 已知扇形
的半径为5,以
为原点建立平面直角坐标系,
,
,则
的中点
的坐标为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7082750ec966ef8c6d2b7150823857a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963df95866427ce3b67cd210e643af09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解题方法
7 . 设函数
,
.
(1)求
的值;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598862afba8b18db988b0f740957b2a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ff6995b4d2d18c865c51488b9c1bb0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386a3591657c19aa04d02f8a256cf9b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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8 . 如图,在凸四边形ABCD中,
,
,若
,则四边形ABCD面积的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b05f661421735de6c6a643f83c6ef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f70d6f5baadf8139ee650b84f2fde70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc7563043c2607606e37b80e14b5426.png)
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解题方法
9 .
的内角A,B,C所对的边分别是a,b,c,则下列命题正确的序号是________ .
①.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0f39cea42e18acc3262a27dded6eee.png)
②.若
,则
是锐角三角形
③.若
,则
是直角三角形
④.若
,则
为等腰三角形
⑤.若锐角
中,则
恒成立
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8207ff1e1605cd98d48489bedd2a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0f39cea42e18acc3262a27dded6eee.png)
②.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95563a79e3b68c597ae1e5167516ff88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
③.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8da7a51abfeeadf9fbce2ccd3e5cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
④.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6980ab948195a337a2fd4cc2cc8f20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
⑤.若锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbffb9cf467437330b5da2c4d55c8592.png)
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解题方法
10 . 已知下列是两个等式:
①
;
②
;
(1)请写出一个更具一般性的关于三角的等式,使上述两个等式是它的特例;
(2)请证明你的结论;
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61a7dce3c7e918ff69c59921cfa0575.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc641c9bd2e45220dfc53a3994ed33ce.png)
(1)请写出一个更具一般性的关于三角的等式,使上述两个等式是它的特例;
(2)请证明你的结论;
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