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解题方法
1 . 在
中,角A,B,C的对边分别为a,b,c,点D为边AC的中点.已知
,且
,则BD最大时角B的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de92d6e3bc9f83ff8e424ee9e4b33ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 有一直角转弯的走廊(墙面与顶部都封闭),已知走廊的宽度与高度都是3米,现有不能弯折的硬管需要通过走廊,若不计硬管粗细,则可通过的最大极限长度为______ 米.
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解题方法
3 . 记
的内角
的对边分别为
.已知
,则
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a92cfa82ed0e7652b482635e72a84ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc940e481607daedc1e83e98ec3bd4c0.png)
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4 . 已知函数
的部分图象如图所示,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6b53eab9bc542dcbc8d7c9642bd3e8.png)
A.![]() |
B.函数![]() ![]() |
C.函数![]() ![]() ![]() |
D.函数![]() ![]() |
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5 . 已知
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725321a4e0204c6e213e487ef1b2dca0.png)
(1)若
,求与
共线的单位向量;
(2)求函数
的单调递增区间;
(3)若
,求函数
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65956dc2c1b45b07fe114e19d76e3c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425cf2568fc3bece2fe3886b4f4c06c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725321a4e0204c6e213e487ef1b2dca0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c6cb0cc172657611e286e7fa669584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47dd5fc03cf0d593fcf67b5d18d1c2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
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解题方法
6 .
中,内角
、
、
的对边分别为
、
、
,且
.
(1)若
,试判断
的形状,并说明理由;
(2)若
,则
的面积为
,求
,
的值;
(3)若
为锐角三角形,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2f9aa3afe9f50954d9bc787a8a2ce8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae7e59e7d1e6814416c15d8abaa8d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8080fef9bdfa92ae70f3e314eef3e3.png)
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2024-05-08更新
|
595次组卷
|
3卷引用:福建省福州市第十五中学等五校2023-2024学年高一下学期期中联考数学试题
福建省福州市第十五中学等五校2023-2024学年高一下学期期中联考数学试题河南省驻马店市新蔡县第一高级中学2023-2024学年高一下学期5月月考数学试题(已下线)专题05 解三角形大题常考题型归类-期期末考点大串讲(人教B版2019必修第四册)
名校
7 . 如图,正方形
的边长为1,P,Q分别为线段
上的动点,则以下说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
A.当P、Q分别为线段![]() ![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() ![]() |
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解题方法
8 . 如图,设
,
是平面内相交成
角的两条数轴,
,
分别是与
轴,
轴正方向同向的单位向量,若向量
,则把有序数对
叫做向量在斜坐标系
中的坐标,记为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4224bf1cbcd51f4cbdce93d981d65c5a.png)
,
计算
的大小
(2)若在该坐标系下,已知
,
,
求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14069d21d32c724f0ebe3e311f114c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5253a9a71037d60059b60237824193b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9aa1d34d66a6876aa0566c8fc8b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4224bf1cbcd51f4cbdce93d981d65c5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18f32baa8e324b33d707f8d59e0a4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ea76d1bd036f5336bb7bdd65984c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4336e15cd9b12893426bbf7bba3a2353.png)
(2)若在该坐标系下,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f537bc105866b16194cd345edc651f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8835f2c4b86b4be1082ac201c36e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9765a33cab40e7f0bb46e9f78b33ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985a67e5e24e049558cd5289b6ee9ce5.png)
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9 . 在
中,内角A,B,C的对边分别为a,b,c.已知
,
.
(1)求证:
是直角三角形;
(2)已知
,
,点P,Q是边AC上的两个动点(P,Q不重合),记
.
①当
时,设
且
,记
的面积为
,求
的最小值;
②记
,
.问:是否存在实常数
和
,对于所有满足题意的
,
,都有
成立?若存在,求出
和
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34bc02f69333db266eeb1e4d8a367726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96fbed3c855b8d52c669712a4410fd39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa79a550591eb9e1bd07bced3a08fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f68ade9c228169668792516571e28a.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a40d2cf43fce0c99dff3470d554eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6283da8b3b002401e671818c788abe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec5d200b561e4be52ccaaebdc3105d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
②记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12c47acbb0d7d46a8de00fc59849feaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4049622421974f1501f377f0f4f4f9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faac624f25ebbba44bf8f2c4a84791cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
10 . 某种植园准备将如图扇形空地
分隔成三部分建成花卉观赏区,分别种植玫瑰花、郁金香和菊花;已知扇形的半径为70米,圆心角为
,动点
在扇形的弧上,点
在
上,且
.
米时,求
的长和郁金香区的面积;
(2)综合考虑到成本和美观原因,要使郁金香种植区
的面积尽可能的大;设
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.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/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44a9c551ab0ecbb72208c1543ee3543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4d476faf357f6499ff47a73a298c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)综合考虑到成本和美观原因,要使郁金香种植区
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867d00157025729b6a66380810466edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
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