已知
.
(1)求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b60022a484666a6d5d6e8b1269bba54.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460f09e562917f6e54b8f6ae3779dca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4834d3c8c59273b7cf3b1ed2d0e1b2.png)
更新时间:2024-01-17 16:51:20
|
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解答题-计算题
|
适中
(0.65)
解题方法
【推荐1】化简求值:
(1)
;
(2)已知
,化简:
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a4a34214e9c74fb89ac403899b3593e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e3727959c931222f1f0df95128e411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64ef9579d62e53f49c2781e939c87431.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知
是关于
的方程
的两个实根,且
,
求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ece887423a0a832afdfa286c0cd57d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9352e9333e6ef83b277ecc26b1c5efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63312a27c07df3d16d89181ec5aadbf2.png)
求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c622c280bce558b22c6ed5b7a12fabc1.png)
![](https://img.xkw.com/dksih/QBM/2011/12/28/1570635491090432/1570635496554496/STEM/1576847333f34e76a67957954acf4895.png?resizew=2)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知
,且
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9f1f872a4208a7f21dedcc50127619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcadd1781ee9177e9bc76ce48afdd0a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6458ff1958780df3bcc8d1c9cb751fc0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e14d060e93624c3bb0e7210ab3f059.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】若
.求:
(1)
的值;
(2)1﹣2sinαcosα+cos2α的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892517d5f5d74f18912b2ae715f1ac80.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd1c2257bbffe7bbaf1f22dd343ad38.png)
(2)1﹣2sinαcosα+cos2α的值.
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】在平面直角坐标系
中,角
的始边为
轴的非负半轴,终边经过点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2eb4369b1a7fcf28e56f5703ae9966.png)
(1)求
的值和
;
(2)化简求值
![](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/db2eb4369b1a7fcf28e56f5703ae9966.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)化简求值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f224e2e7ac85f4ae55c4fd0a9fb6123.png)
您最近一年使用:0次