在平面直角坐标系
中,设锐角
的始边与
轴的非负半轴重合,终边与单位圆交于点
.将射线
绕原点
按逆时针方向旋转
后,与单位圆交于点
.记
.
(1)求函数
的值域;
(2)求
的单调递增区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab08d1d1b35dded11555daf0baa02c83.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
更新时间:2019-11-06 21:36:28
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解答题-问答题
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解题方法
【推荐1】如图所示,A,B是单位圆O上的点,且B点在第二象限,C点是圆与x轴正半轴的交点,A点的坐标为
,
为正三角形,记
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/7ff48acb-99db-4dfb-9661-78297512298a.png?resizew=146)
(1)求
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfd8da8cf8cfacb41ba262bfe0d77cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2041063e1d4bd69b682f02f8cc5c24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/7ff48acb-99db-4dfb-9661-78297512298a.png?resizew=146)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6503b6c4c31056d6199fda05f8d004ca.png)
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【推荐2】如图,在平面直角坐标系
中,
为单位圆上一点,射线OA绕点O按逆时针方向旋转
后交单位圆于点B,点B的纵坐标y关于
的函数为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/6d77a6ce-b1ac-4a57-87dc-5244ebf8e4a0.png?resizew=202)
(1)求函数
的解析式,并求
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bf5ebc9afe11a66bfbad4ae86600d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8111b51754b9b448995098efecee98f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/6d77a6ce-b1ac-4a57-87dc-5244ebf8e4a0.png?resizew=202)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f0ef6501db2e606ab5150ecef0f539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9545d609fe4cd37aa03d2935eec0517b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2fd0d23d577129199cba8c18208631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37dc1c79c03ea5214af292aaeb0cef4f.png)
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【推荐1】已知函数
的图象如图所示.
(1)写出函数
的关系式;
(2)已知
,
.若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/5bed88e1-1f8a-4a1e-8a74-bbf88d7e48a7.png?resizew=212)
(1)写出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5c248d456304d3eb7c18a26aad7e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcb656e11b0173bff5dc7eb56aa1f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb605828ee0ea01e8763ddeaacb1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
【推荐2】已知
且满足:
.
(1)求
的值;
(2)已知函数
,若方程
在区间
内有两个不同的解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f99e168c6dea8dea21831a36546ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2492ddda8355b8f56981b61fea2c09b2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6da4f9ea5324f1d47491876318087c57.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99732cb518cb5909fe1f3ad249bc559c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338316b0fe50fdea0f2f75aec4c990dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b77857e15ae11fc94a5e33bfc12d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21e75b3d0f58977d00cbf02b78950eb.png)
(1)求
的对称轴方程;
(2)求
在区间
上的单调区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21e75b3d0f58977d00cbf02b78950eb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980d0b9940f58cd2993e98d0c93563c1.png)
您最近一年使用:0次
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【推荐2】已知函数
(
,
).再从条件①、条件②、条件③这三个条件中选择能确定函数
解析式的两个合理条件作为已知,条件①:
的最大值为1;条件②:
的一条对称轴是直线
;条件③:
的相邻两条对称轴之间的距离为
.求:
(1)求函数
的解析式;并求
的单调递增区间、对称中心坐标;
(2)若将函数
图象上的点纵坐标不变,横坐标变为原来的
,再向右平移
单位,得到函数
的图象,若
在区间
上的最小值为
,求m的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c756f3523cabf7d1bdf8a83ad395ec48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.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/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be52ea758b5a7ad67645a2744380810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aae59d65271718f4ced2a8871835023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3f7f762131c77a3c8440b4a3bc1d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6181ea7339144345677568a7fd485f84.png)
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【推荐3】设函数
,函数
的最小值为
,且
为函数
的一个零点.
(1)求函数
的单调递增区间;
(2)若对任意的
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9390b872250ed9274e85ce2e45f79f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f56a20bc5fce6b02217627b42249854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b63a87545fb8a1913ad16e376d42bd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42b8c846939ceefab778b34538d41e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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