1 . (1)求证:
;
(2)求值:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79550f905cc078a01d6214058a8a37d1.png)
(2)求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3f0b77ffd4bf05856fbad7f921f89a.png)
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解题方法
2 . 现定义“
维形态复数
”:
,其中
为虚数单位,
,
.
(1)当
时,证明:“2维形态复数”与“1维形态复数”之间存在平方关系;
(2)若“2维形态复数”与“3维形态复数”相等,求
的值;
(3)若正整数
,
,满足
,
,证明:存在有理数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9dc4e868a310c371ff88075d8a966a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef9d830212489b316bb052455098108e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc8299790d98621b87e73212a2ebb91.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905dd10639c9fef5ef8d66a124756140.png)
(2)若“2维形态复数”与“3维形态复数”相等,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c136aaf9b5dedec254a92ce302f4a70c.png)
(3)若正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94742ebbb028c50d7a58e3e8f4ab329c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35490c12e57ecd91af9934cb17b5c927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed110fbfeb14003270a1039ba174d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f02f2606180ffeda602ff9ae747af6f.png)
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3 . (1)计算:
;
(2)求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7afaebeb7c6c32ad9b9d84778b88d5da.png)
(2)求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781cc7e1e3798d6a472deedaf26f76a6.png)
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4 . 如图,在平面坐标系
中,第二象限角
的终边与单位圆交于点A,且点A的纵坐标为
,
为第一象限角,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7383500859bbf83a8d0241104fb9538b.png)
的值;
(2)求
的值.
![](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/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7383500859bbf83a8d0241104fb9538b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b4f4cd0b9c4cfed756bc8d58c9caf1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38272791145afd5d5bcab59dce6b8934.png)
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5 . 化简或计算下列各式:
(1)计算:
;
(2)角
的终边经过点
.
求
的值.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78dc0d5583b66e17428ecb73d93e349.png)
(2)角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18810166ce296390380f6689dd2eb60c.png)
求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e85fd090ad4ca88610138bb55882ef9.png)
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6 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a33a3d0c1bc303aff8d2d9bd16a7a71.png)
(1)求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a33a3d0c1bc303aff8d2d9bd16a7a71.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b352192355d5965498cffd01511ef18.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231813e1ae35224ab38f9b9c9fa04154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26cd826bf9ed9ca6e2bbb477da71c90b.png)
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7 . 在中,已知
,D为
的中点.
(1)求A;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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湖北省高中名校联盟2024届高三第三次联考综合测评数学试卷(已下线)重难点3-2 解三角形的综合应用(8题型+满分技巧+限时检测)(已下线)第2套 重组模拟卷(模块二 2月开学)(已下线)6.4.3余弦定理、正弦定理(第1课时)广东省广州市执信中学2023-2024学年高二下学期3月月考数学试题
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8 . 已知角
的终边经过点
,求:
(1)
的值
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111fc953684b51df437ef2bc02290ad5.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7aee715ac87a76f7a00996af77481ed.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1df096ac7f80c2b11d2ad83b2134a3.png)
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9 . 已知
.
(1)若
,求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b803590002214d0f8bf3bb306a047c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e179f16e9c3412d23e007d331a1ac75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1f00af8fb3dd9b1cf251897c091ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924610e926b0d0bf49d20fbde950b528.png)
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10 . 已知函数
.
(1)化简
;
(2)若
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6b280322c63bd029ac3b814409d1cd.png)
(1)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95484458f2a104d90cdbf6be4e1648d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe91ce727a65ef27026bf67c45b622e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2ba120fd8b71f004fc910df3e307e1.png)
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