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1 . 已知函数
,若
对任意的实数x都成立.
(1)求
的最小值;
(2)在(1)中
值的条件下,若函数
的最小正周期为
,当
时,方程
恰有两个不同的解,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040291f6f7d78740cccb7e652fec68d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003fa46d0039c45498c7b2bc4ea8d961.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(2)在(1)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432e7e0709f14526e4d045971b1a3a19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21376567e7a56b85e967dc4f2a5cef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd569dea5ce34578ebec285e816dbdc7.png)
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2021-02-21更新
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753次组卷
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5卷引用:甘肃省金昌市永昌县第一高级中学2020-2021学年高一上学期期末数学试题
甘肃省金昌市永昌县第一高级中学2020-2021学年高一上学期期末数学试题(已下线)专题5.7 三角函数的图象与性质-重难点题型精讲-2021-2022学年高一数学举一反三系列(人教A版2019必修第一册)宁夏青铜峡市高级中学2021-2022学年高一上学期期末考试数学试题(已下线)上海市华东师范大学第二附属中学2022-2023学年高一下学期期中数学试题(已下线)第12讲 三角函数的图像与性质(13大考点)(2)
2021·上海浦东新·三模
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2 . 某工厂承接制作各种弯管的业务,其中一类弯管由两节圆管组成,且两节圆管是形状、大小均相同的斜截圆柱,其尺寸如图1所示(单位:
),其中斜截面与底面所成的角为
,将其中一个斜截圆柱的侧面沿
剪开并摊平,可以证明由截口展开而成的曲线
是函数
的图像,其中
,
,如图2所示.
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725319832076288/2730995936878592/STEM/306e80d3-1869-484b-b0c3-2bec5b669829.png?resizew=228)
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725319832076288/2730995936878592/STEM/6a824180-fff5-4dc0-822f-7fb64b201efd.png?resizew=240)
(1)若
,求
的解析式;
(2)已知函数
的图像与x轴围成区域的面积可由公式
计算,若制作该种该类弯管的一截圆管所用材料面积(即斜截圆柱的侧面积)等于与之底面相同且高为
的圆柱的面积,求
的值(结果精确到
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e58750ec6571eaa9f2ac3ca6f0a6ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a63412a8e10dca8d002978e17c45a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725319832076288/2730995936878592/STEM/306e80d3-1869-484b-b0c3-2bec5b669829.png?resizew=228)
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725319832076288/2730995936878592/STEM/6a824180-fff5-4dc0-822f-7fb64b201efd.png?resizew=240)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2e859e649b43a21b623f63472122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58a22ac4aca667f4363d3526feb8f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18703d241f6fe0a0dedcc815603322fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1008a3fc217ce647e16fa09e42ceadb1.png)
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