已知函数
的最大值为
,最小正周期为
.
(1)求
、
的值及
的解析式;
(2)若
的三条边a、b、c满足
,边a所对的角为A,求角A的取值范围及函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56fa5931e5e6abcea2b7119118828f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a99bb77a5ec8629e26b0329a8a21db2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e3d87be9f706832ef25537d78a201b.png)
更新时间:2021-12-01 23:56:55
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解题方法
【推荐1】某中学校园内有块扇形空地
,经测量其半径为
m,圆心角为
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(2)你有没有更好的设计方案来获得更大的篮球场面积?若有在图2画出来,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6c71a0da6a878a5b12bf8a8e784645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/0f279aa4-db46-4272-a3c6-3574b5d8ad96.png?resizew=480)
(1)求出初步设计方案中矩形ABCD面积的最大值.
(2)你有没有更好的设计方案来获得更大的篮球场面积?若有在图2画出来,并证明你的结论.
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【推荐2】在锐角
中,角
所对的边分别为
,且满足
.
(1)求角
的值;
(2)若
,求
周长的取值范围.
![](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)
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(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】在已知函数
,
(其中
,
,
)的图象与
轴的交点中,相邻两个交点之间的距离为
,且图象上一个最低点为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3d7947869b86bb1872e4bbdf8fc372.png)
(1)求
的解析式;
(2)当
时,求
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(3)求
在
上的单调区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d1d29eeb9b4561d7b6718523dd9c3d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f1a3feca6218955446108ebad0a524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4bd2c4e053828486eea8e6b64c27f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01293c75043b2c0ff2df020a2f5fec50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31cfbfab81d0510c53835c7e23773131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de12bbd5097debc83d6a46364589748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3d7947869b86bb1872e4bbdf8fc372.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3077373ea6261e7318cf23e738a6c455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77214921b04fdde9228e4cba9ce7e94.png)
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【推荐2】已知函数
的周期为
,图象关于直线
对称.
(1)求
的解析式;
(2)在钝角三角形
中,角
,
,
所对的边为
,
,
,若
,
,
,
为
的中点,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c101bf569975cbe7da6cd8fd45722926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c63e1c64c42b7f3b7fdc396d4756cab.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)在钝角三角形
![](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)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71b8326e00cd285d4f76a421e87bb33.png)
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【推荐3】已知函数
相邻两个零点之间的距离为
,且
的图像关于点(
,0)对称.
(1)求函数
的解析式;
(2)将
图像上所有点的横坐标缩短到原来的
,纵坐标不变,再将所得的图像向右平移
个单位长度,得到函数
的图像,若
在[0,m]上的值域为[-1,2],求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7146bf2d254d6b6926e92ce7e133205e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a087749d28290a98d8177160b34961.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdaf49f9611922348aa2784465da614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
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解题方法
【推荐1】
中,角
的对边分别为
,从下列三个条件中任选一个作为已知条件,并解答问题.①
;②
;③
的面积为
.
(1)求角A的大小;
(2)求
的取值范围.
注:如果选择多个条件分别解答,按第一个解答计分.
![](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/a558d910e6ba04a3a3ca1671d1792ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f8af3cab43d080e153ca720398ed63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e203518e337b4c9eed6b5cc61d2fc3.png)
(1)求角A的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799a89348650d83b6917787616a256e5.png)
注:如果选择多个条件分别解答,按第一个解答计分.
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【推荐2】设
的三个内角A,B,C所对的边长分别为a,b,c.平面向量
,
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6516a72fff13f62ef3120ed78d1d5fdc.png)
(1)求角A的大小;
(2)当
时,求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a92d57f4693070a6d9bf69fe15c244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2eadc851f120aad0cff91c1ece3bf23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96025d8b692819bb65fa7201a308f7d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6516a72fff13f62ef3120ed78d1d5fdc.png)
(1)求角A的大小;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c106b10c2cea8c37bd23a19d8fb5e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ea26a0cf238cd94ea9a082034f148b.png)
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解题方法
【推荐1】在“①
;②
;③
”这三个条件中任选一个补充在下面的横线上,并加以解答.
在
中,角
所对的边分别为
,且______.
(1)求角
的大小;
(2)若
表示
内切圆的半径,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835ce66de2ae52b8881fccc4d9500b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60f3d8e528f2b3e55d2d45fdc9c3121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8c513d286dd87aede05a85b9346e38.png)
在
![](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)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cccd23120224aab939254c8b91da30e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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【推荐2】如图,某公园有三个警卫室
、
、
有直道相连,
千米,
千米,
千米.
(1)保安甲沿
从警卫室
出发行至点
处,此时
,求
的直线距离;
(2)保安甲沿
从警卫室
出发前往警卫室
,同时保安乙沿
从警卫室
出发前往警卫室
,甲的速度为1千米/小时,乙的速度为2千米/小时,若甲乙两人通过对讲机联系,对讲机在公园内的最大通话距离不超过3千米,试问有多长时间两人不能通话?(精确到0.01小时)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
(1)保安甲沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5064f5ce5ac8428e277fd578da84ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)保安甲沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/2018/11/7/2070528200056832/2075480901222400/STEM/8fa10ff7abce473fbc300b5074587447.png?resizew=171)
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