已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d68c331cc1f244b0f0f3885bece356.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064f1d4a3d18f7fee7f71926091dd765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffd1f6bd3686a07efa4086a02b96a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d68c331cc1f244b0f0f3885bece356.png)
更新时间:2023-10-12 18:49:27
|
相似题推荐
【推荐1】下列判断正确的有___________ .
①如果
是第一象限角,那么恒有
;
②
,则
;
③若
的定义域为
,周期为4,且满足
,则
在
至少有7个零点;
④若
,且
,则
.
①如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179f4b6261dab1a6a4fbdfaa7c418655.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a87b4686e96eb5492a135b0caec9480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc60e40025d8eb82080987f48b41569.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d88a41a8c39757a1bbcc8ae9052c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc88ba01f958eb3b85b451b731cbebd5.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116e70b7caa41578d018bafd7515661d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d7bce36167945539d3cbba04d29e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a5abe56c019ac914e1fcde1865a747.png)
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【推荐2】下列说法中正确的有________ .(写出所有正确说法的序号)①正角的正弦值是正的,负角的正弦值是负的,零角的正弦值是零;②若三角形的两内角
,
满足
,则此三角形必为钝角三角形;③对任意的角
,都有
;④对任意角
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bab73e18263b9ea6f61e84becd3b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a4b5cb902e3a14490217029a5b844e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70b373e784455c366c5da90fd62588b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c0116e1ab704727e440426bb908c1e.png)
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解题方法
【推荐1】若
,
.且
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10a261da289d08fcd429cd1eae1d1c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f478abeeb4da23121b652cf907972d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9d76ac6769bd332849d495b60b422d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
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解题方法
【推荐2】在
中,
分别为角
所对的边,且
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/690d4ce4481b4fe5d994778003787ef1.png)
_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff0feb7b37063eef8d36f3c5b4bcf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1dd07c0571772e96d318f974724810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/690d4ce4481b4fe5d994778003787ef1.png)
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【推荐3】已知三角形
的外接圆半径为1,外接圆圆心为O,且O点满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14924808273a587c04a68c4cbbaf9674.png)
_______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b351337bbbf0e7c10ac201302acf90.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/908e3e6a1d2ba6fe68d710b1a785a97e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14924808273a587c04a68c4cbbaf9674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b351337bbbf0e7c10ac201302acf90.png)
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名校
解题方法
【推荐1】
中,角
的对边分别是a、b、c,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448ba6bd4409bd26cca62a7450fb8543.png)
,则
的形状是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448ba6bd4409bd26cca62a7450fb8543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5195839c05d101b83c0bc4e9a200b3fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
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解题方法
【推荐2】设
,
,
,若对任意实数
都有
,定义在区间
上的函数
的图象与
的图象的交点横坐标为
,则满足条件的有序实数组
的组数为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19339e3904e9541ff26b30ae5f1242b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d6b852771bd57587e1fc30188949a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8657d494f8ffb3a0e55e943b7cecf8cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d8f3029f3a660792bd92cec25928b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325f9e2f7784ebdd64292e805884dfa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c65d71e57e6e7697e2f627dcd58583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5e4be004a34cfce346c12feea0a696.png)
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