解题方法
1 . 在
中,角
的对边分别为
.若
,则
的最小值为( )
![](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/793f1806fef75e1dec64a95b84a19e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e563e032dfdef69b0f357060c27bd4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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今日更新
|
140次组卷
|
2卷引用:江西省多校联考2023-2024学年高二下学期6月摸底考试数学试题
解题方法
2 . 如图,在四棱锥
中,四边形
为正方形,平面
平面
,
是边长为2等边三角形,点
分别为
的中点,点
为线段
上一点(包括端点).
为线段
的中点,求平面
和平面
夹角的正弦值;
(2)当直线
与平面
所成的角最大时,求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d730ceac3b62e43c6a2761c3754479c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6612c697aa43a72115e5dce1106c0557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d6d600e2676abc87e05cde8aebc1a.png)
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3 . 设函数
,
.
(1)当
时,求函数
的单调区间;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40db9dceb2d88988790ed9e6327d3a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ae6d5e25c5bc3afe1ca6d86c219a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dab614d13fbc46a0e79e7583f7eef1.png)
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名校
解题方法
4 . 若“
,
”为真命题,则实数a的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c501353a892ca1eec0594c53e6b743ed.png)
您最近一年使用:0次
名校
解题方法
5 . 在
中,角A,B,C所对的边分别为a,b,c.若
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e8370a3c1802256270059fd6f4b207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23511ccf4ac3f865d3f3a830dc55a5da.png)
A.![]() | B.![]() | C.![]() | D.4 |
您最近一年使用:0次
昨日更新
|
572次组卷
|
5卷引用:河南师范大学附属中学2024届高三下学期最后一卷数学试题
河南师范大学附属中学2024届高三下学期最后一卷数学试题(已下线)核心考点3 解三角形与实际应用 A基础卷 (高一期末考试必考的10大核心考点) 江苏省泰州市2024届高三下学期四模数学试题(已下线)【高一模块一】难度7 小题强化限时晋级练 (较难1)(已下线)解三角形-综合测试卷B卷
解题方法
6 . 已知斜三角形
.
(1)借助正切和角公式证明:
.
并充分利用你所证结论,在①②中选择一个求值:
①
,
②
;
(2)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(1)借助正切和角公式证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f846e5859aab52461b125a83652ec9.png)
并充分利用你所证结论,在①②中选择一个求值:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7798db106b4bed40fd7b43a9eaeb463.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6508e636cfd77c0a0406b3fbf3b70213.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5cc19955c1f24f90d36c68aba23bebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30f03a31c8a873bfcf7287e45b6c6a0.png)
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解题方法
7 . 在
中,角
所对的边分别为
,
,
的角平分线交
于点D,且
,则
的最小值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516983449108347c9bbf5dd2a72ab3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90d7f054e8f0346479e1999622f11cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0a4dbb8b5b8bc3e4d6f3959a26b33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a528c88868d6a80a1e5cc9f61dd4ddce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715aa87456e207a91614c4c5853b7255.png)
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名校
8 . 已知
,
.
(1)解关于x的不等式
;
(2)若
是方程
的两个实数根,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2eb4185432994d8037ef5b05a6009a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)解关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffbd6d46c75b7454cc1259ed8d818ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b921b1d9cbc9bad8cc999e13e747517f.png)
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9 . 若
,且
,则
的最小值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f57f35fbbb5d288691dda630a44961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad57e28b984b3e90b70cd7c747bdaf4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9145e0ff4960d4b695aafd75b6221279.png)
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解题方法
10 . 下列命题是真命题的是( )
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若正实数![]() ![]() ![]() |
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