1 . 设
是定义域为
的函数,如果对任意的
、
均成立, 则称
是“平缓函数”.
(1)若
, 试判断
和
是否为“平缓函数” ? 并说明理由; (参考公式:
时,
恒成立)
(2)若函数
是“平缓函数”, 且
是以 1为周期的周期函数, 证明:对任意的
、
, 均有
;
(3)设
为定义在
上函数, 且存在正常数
使得函数
为“平缓函数”. 现定义数列
满足:
, 试证明:对任意的正整数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1076aeb555debc8bf15c586375d64c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2fe919afe3583b1ef0dadbd23102a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70458945dae62f8f6a553dfaa8eb723a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b40b099989abb2d15ddf60413c8a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640461197eaf70c0ebe1eb89daf383c1.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33890c6b0bf167514d44139d9dca0154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a2b43fdce5aaae58c0907de23cbc6c.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6bf90a1bbeea09e1b7206975a99f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66efdaa9fe939b2b1a7326aaf5e35d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f422484ad3a17eeebc4d15a3fb6289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848ea90ecbd6c506a78058f983ff5614.png)
您最近一年使用:0次
名校
解题方法
2 . 对于角的集合
和角
,定义
为集合
相对角
的“余弦方差”.
(1)集合
和
相对角
的“余弦方差”分别为多少?
(2)角
,集合
,求
相对角
的“余弦方差”为多少?
(3)角
,集合
,求
相对角
的“余弦方差”是否有最大值?若有求出最大值,若没有说明理由?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94201a1fe57d13f172c3347fe2f2f0c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0578330c7c71ecdf4354d855174051a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94201a1fe57d13f172c3347fe2f2f0c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1894b46e13b35c59a8868c301df8c4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae35267fd999a81a65596312be5bf31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1676b17f3641daf630f709517d22d120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e2bf1f8cf438ad7898cf463b2ab07e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b18694da971f8a3bf64ca54b4d5198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740d1fc2346ac825c16515558b1af667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
解题方法
3 . 在
中,
对应的边分别为
,且
.且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9b04e29a3334fd8f6156e6e1f8aa1.png)
(1)求
;
(2)若
,
上有一动点
(异于B、C),将
沿AP折起使BP与CP夹角为
,求
与平面
所成角正弦值的范围.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271edf347d9890c3b4838fa35fc2b298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9b04e29a3334fd8f6156e6e1f8aa1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668c8ab5abdba7173bcbe573ae87dad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df5935c893580c77ab6fa6eb0a70bdb.png)
您最近一年使用:0次
名校
解题方法
4 . 令
,
,定义函数
,如果
,则称非负整数n为好整数,所有好整数的集合记作W.
(1)求
、
的值;
(2)证明:
;
(3)求出集合W.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c92cf1759acf10d2e74f6e4915158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f7a420205bbe7fb7a5707a14fd3a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d71c5943b3d883e8721a4c5bbee5e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b91e45df2d12396d9dbdf8748fec07.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce6155e181e21ce56ea658b70f8af17.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5398b3972437e94931fbbc9504f80d3.png)
(3)求出集合W.
您最近一年使用:0次
解题方法
5 . 记
的内角A,B,C的对边分别为a,b,c,已知
.
(1)若
,求B;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c441662286a662cafd001968d531f8e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09eebab59213386449a726b75065bf76.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e911b4c3316981231030c185079161.png)
您最近一年使用:0次
2023-01-27更新
|
4410次组卷
|
3卷引用:浙江省数海漫游2023届高三下学期一模数学试题
6 . 设锐角三角形ABC的内角A、B、C所对的边分别为a、b、c,已知
.
(1)求证:B=2A;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6194c583037bd04e32fbf9b435084a9d.png)
(1)求证:B=2A;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd950ec83d93596468e3aff0bb91e0e9.png)
您最近一年使用:0次
2022-12-29更新
|
5087次组卷
|
7卷引用:专题4 三角函数与解三角形 第2讲三角恒等变换与解三角形
(已下线)专题4 三角函数与解三角形 第2讲三角恒等变换与解三角形安徽省阜阳市第四中学2023届高三下学期第一次月考数学试题第11章《解三角形》单元达标高分突破必刷卷(培优版)陕西省渭南市韩城市象山中学2022-2023学年高一下学期期中数学试题广东省汕头市2023届高三上学期期末数学试题(已下线)高一下学期期中复习解答题压轴题十八大题型专练(1)-举一反三系列(人教A版2019必修第二册)(已下线)专题02 高一下期末真题精选(1)-期末考点大串讲(人教A版2019必修第二册)
名校
解题方法
7 .
中,内角A、B、C所对的边分别为a、b、c,满足
.
(1)当A为何值时,函数
取到最大值,最大值是多少?
(2)若
等于边AC上的高h,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12d1c74baba98e36164ffdedfc36828.png)
(1)当A为何值时,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9972198ff77126bb3281cc5613b97dc9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8409329b550296446a936d97c491ca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72707767d1a0ed7694cf9319b7dd993d.png)
您最近一年使用:0次
8 . 已知
,
,且
,求
、
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eeae4e4940d654f083f1073ba872504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd4235273e614e4b5ceb497e49d25de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38a0c04192059eeb2ab1dd695d8a3544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
您最近一年使用:0次
2021-09-25更新
|
1404次组卷
|
6卷引用:模块三 专题4 (三角函数)(拔高能力练)(北师大版)
(已下线)模块三 专题4 (三角函数)(拔高能力练)(北师大版)(已下线)模块三 专题2《三角化简求值中的技巧应用问题》(人教A)高中数学解题兵法 第八十一讲 审题、谍划,构思方案(已下线)第03讲 几个三角恒等式-【帮课堂】2021-2022学年高一数学同步精品讲义(苏教版2019必修第二册)2022年南京大学强基校测笔试数学试题福建省龙岩市上杭县第一中学2022-2023学年高一上学期数学期末测试题(二)