在锐角
中,内角
的对边分别为
,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4360ab0ad55cce4e9604b6e0ec5d0c2f.png)
(1)求角C的大小;
(2)若
,角A与角B的内角平分线相交于点D,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4360ab0ad55cce4e9604b6e0ec5d0c2f.png)
(1)求角C的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
22-23高三上·黑龙江齐齐哈尔·期中 查看更多[5]
黑龙江省齐齐哈尔市八校联合体2022-2023学年高三上学期期中考试数学试题湖南省长沙市四校2022-2023学年高二上学期期中联考数学试题(已下线)专题02 正余弦定理在解三角形中的高级应用与最值问题(精讲精练)-1(已下线)专题4-3 三角函数与解三角形典型大题归类-1陕西省西安高新第一中学2023-2024学年高一下学期第一次月考数学试题
更新时间:2022-11-06 17:03:45
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适中
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名校
解题方法
【推荐1】如图,在平面四边形ABCD中,E为线段BC的中点,
.
,求AE;
(2)若
,求AE的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb12049c4ca9c62d12c884bbaa9d09.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df54bb4e7febefb181ed69139d76317d.png)
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【推荐2】设
内角A,B,C的对边分别为a,b,c,函数
.
(1)若
,求
的面积;
(2)当
时,
取最大值,求
在
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e12865c451081edb3e5dda0aef75d4c0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ec091359b86246d2b4116b88b9e6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5a2e8a8ce17b9dd84ce10933358859.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/3f00f2f6ab162f9333ec55db195d663b.png)
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【推荐3】设函数
.求函数
在区间
上的最大值和最小值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83470bdffcc279f153710b2d574c8a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03f29d849229dbdbd4d53d9ea4fe90c.png)
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【推荐1】在
中,
,
,
,记
与
的夹角为
.
(1)求
的取值范围;
(2)求函数
的最大值和最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c384cc1fb06dadc1432aa940cde00299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90f8fe1fe3027d922e5930e0075837bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c736923df7c6b244e6022d59baeee5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdb9b7aaa2493a5adfca8efd6883846.png)
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适中
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【推荐2】已知函数
.
(1)求
的最小正周期;
(2)当
时,求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1410195a13701a6d6ff3c6d31c9176e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce485410257c9c1fae9d87ce3e44cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解答题-计算题
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【推荐3】已知函数
经化简后利用“五点法”画其在某一个周期内的图象时,列表并填入的部分数据如下表:
(1)请直接写出①处应填的值,并求函数
在区间
上的值域;
(2)
的内角
,
,
所对的边分别为
,
,
,已知
,
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df6a0d6ee46489c9865920c84cf8f10.png)
![]() | ① | ![]() | ![]() | ||
![]() | 0 | 1 | 0 | ![]() | 0 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4607e9f81a317703cf52ef9dfe685c8e.png)
(2)
![](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/2f5abffd74bebdcf581ac380624de5fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b117c0e2c7a70c00ad56675598f77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783d6adfa8fb1352679c5185258d842a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】
中,角A、B、C所对的边分别为a、b、c,已知
,边
.
![](https://img.xkw.com/dksih/QBM/2016/5/19/1572642565980160/1572642572156928/STEM/53b9ec57828548f6beb5640e232f3edd.png?resizew=196)
(1)若
,求边b的长;
(2)当
时,若
,求
的大小;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1466856bf2570685d3629c1f813748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e245411397acbba561c9733b3ec9c55f.png)
![](https://img.xkw.com/dksih/QBM/2016/5/19/1572642565980160/1572642572156928/STEM/53b9ec57828548f6beb5640e232f3edd.png?resizew=196)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2b073e987ca6520e332117795759ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ae39dacfc3a263af11227aba39dfab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5daacfca03b233bee267ed7410cd43c7.png)
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【推荐2】记△
的内角A,B,C的对边分别为a,b,c,已知
,点M在AC上,且
,
.
(1)求B;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ff6ea708abd034a1d672b08f5482cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54b84e748954ede821959f6f6713682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fa0a286a55692e4263a5993b01580b.png)
(1)求B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】在
中,角
,
,
所对的边分别是
,
,
,
.
(1)求
;
(2)若
是边
上一点,且满足
,
,求
的最小值.
![](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/8c61acdb686e5e4c477a79b0a2cd9257.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6da833fe53cde99eaaf23b3e186f016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
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【推荐2】在①
,②
,③
这三个条件中任选一个,补充在下面问题中,并作答.
问题:在
中,角A,B,C所对的边分别为a,b,c,且 .
(1)求A;
(2)若角A的角平分线
,且
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4666b737a55e5d514a97ebd0f805bdd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370800e186dd3bf6223f5a5cf5817f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3af7e461e92de9431816771866ae26.png)
问题:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)求A;
(2)若角A的角平分线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7165c012456e5fe91f2f8eb0a7df3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-证明题
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【推荐3】如图,在平面四边形
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/4fb3402f-f470-411a-9942-7ef9b19dcd0f.png?resizew=182)
(1)证明:
;
(2)求
面积的最大值;
(3)设
为线段
的中点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59567dbf014b5608475254efb2cf2c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58899f5c3638f1e32274137723f99836.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/4fb3402f-f470-411a-9942-7ef9b19dcd0f.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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