在①
,②
,③
的面积为
,且
,这三个条件中任选一个,填入下面问题中,并求解.
在锐角三角形ABC中,角A,B,C对应的边分别是a,b,c,函数
的最小正周期为
,c为
在
上的最大值,且 ,求a-b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b86308eec25f94db0a5e7a58765206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dd0c2a4a1107ea28a418a7d281ef5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341d455284c0850829e1d0e0b5147761.png)
在锐角三角形ABC中,角A,B,C对应的边分别是a,b,c,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309f0e3717ee05573ea5f6f1733cb5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea7e406afac9609ca4015d25066af1e.png)
更新时间:2021-10-30 00:22:56
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【推荐1】某实验室某一天的温度(℃)随时间
的变化近似地满足函数关系:
,
,
.已知早上6时,实验室温度为9℃.
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(2)求实验室这一天中的最大温差;
(3)若要求实验室温度不高于11℃,则在哪个时间段实验室需要降温?
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【推荐2】已知函数
的部分图象如图所示.
(1)求函数
的解析式;
(2)将
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个单位长度,再将纵坐标变为原来的4倍,横坐标不变,得到函数
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/33f61e0c-a4e0-479f-aaab-4c32dfbd8cc9.png?resizew=166)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
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解题方法
【推荐1】已知
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,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db12e32ec95af7a916cd136fd21afc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99043a7ca7766a45fca34ce0fb59edaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae470980d6e3b53c65b9d42d1f011c5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7796cec50ed668e457ae5398295533af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e496ee7d3685671a6c9dcf1821c58c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/483053da66e1cdcd910c4b24f72bfd2b.png)
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【推荐2】如图所示,求椭圆
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【推荐3】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14018b66085e39747eaa90ab76dec64a.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a30cdeccc312028502c30ca324d62e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f857f5d896255fc31494ef9fdb5df1c.png)
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【推荐1】在①
,②
,③
这三个条件中选两个能解决问题的条件,补充在下面的问题中,并解决该问题.
在
中,
、
、
分别为内角
、
、
的对边,且满足
.
(1)求
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(2)已知
存在,且_________,_________,求
的面积.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe8fff55c06f220725f4124e45a1e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.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/6421a101aab17221e3c0c8489a44686e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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(0.65)
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解题方法
【推荐2】如图,在四边形
中,已知
,
,
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/59eb61c6-8d7c-48d3-9eb9-8aadf20d86e8.png?resizew=164)
(1)若
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(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e81869067f61de725fa4ccc0e4e2a6.png)
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(2)求
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【推荐1】在①
,②
,③
的面积为
这三个条件中任选一个,补充在下面的问题中,并作答.
在锐角三角形
中,角
所对的边分别为
,______.
(1)求
;
(2)已知
是
的平分线与
的交点,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/d4fe46f8a66b85700170e91ccb73e89b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3408f4bab8689f146c6f8c4e3a63b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b213b054bb0076777e7920fe185bde4f.png)
在锐角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c7a05aafa888d12273e6e2744a7544.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】已知
的内角A,B,C所对的边分别是a,b,c,
.
(1)求角B;
(2)若
,求
的面积
,求
的周长l的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4dab9c032b7eb5e8f7d01bfe788c578.png)
(1)求角B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e01ae7e8a4ad8c58c98fdb6a9f8029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次