解题方法
1 . 已知
,
是第四象限角,则
的值为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57444ead804245890b18f4b8a2b4e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87a846fe363e4ae184c75f759b29c75.png)
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解题方法
2 . 如图,在边长为4的正方形ABCD中,M,N分别为线段BC,DC上的点,且
,
,则
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e5c289b8aabdbfba95c7fd1e1842f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2650fce45eabd6d607e8eae70db4aa5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e6f0e94393fc6bbd9b4b83ede534ac.png)
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解题方法
3 . 已知向量
,
的夹角为
,
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e310702748855c3edccd151aae0143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed7444ed9ccdd2dc5ac13be29f40fc68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9ee73e05c2ea6a4b937b7ff42ac925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ef2b20e067d1865108bdb4ac7c1095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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4 . 若
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef75d4f20a2c300d7549257a69b30b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
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2024·全国·模拟预测
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解题方法
5 . 已知
是第二象限角,且其终边经过点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba427d7fadf1cea93929f8e9b896fa92.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663e2a3c6f6988e81c4ffcf1bddd1c4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba427d7fadf1cea93929f8e9b896fa92.png)
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6 . i表示虚数单位,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482976a0e85c2f6f53d5e7d641cfd2a8.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482976a0e85c2f6f53d5e7d641cfd2a8.png)
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2024-04-22更新
|
399次组卷
|
3卷引用:甘肃省武威第十八中学2023-2024学年高一下学期期中考试数学试卷
甘肃省武威第十八中学2023-2024学年高一下学期期中考试数学试卷湖南省常德市第一中学2023-2024学年高一下学期第一次月考数学试题(已下线)10.2 复数的运算-【帮课堂】(人教B版2019必修第四册)
名校
7 . 二战期间,盟军统计学家将缴获的德军坦克序列号作为样本,用样本估计总体的方法得出德军某月生产的坦克总数.假设德军某月生产的坦克总数是
,缴获的该月生产的
辆坦克序列号从小到大为
,即最大序列号为
,且缴获的坦克是从所生产的坦克中随机获取的,因为坦克的序列号是连续编号的,所以缴获坦克的序列号
,相当于从
中随机抽取的
个整数,这
个数将区间
分成
个小区间,其中前
个区间已知,最右边的区间未知(由于
未知).由于这
个数是随机抽取的,所以可以用前
个区间的平均长度
来估计所有
个区间的平均长度
,进而得到
的估计值.例如,某月盟军缴获坦克的序列号是
,则统计学家利用上述方法估计德军该月生产的坦克数约为__________ 辆.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ad2afd39d9692834c46dfdda2577e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ad2afd39d9692834c46dfdda2577e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aceb113626093e0e431f30fa45c2c444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9f29abda46edf654866e9594f91a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aceb113626093e0e431f30fa45c2c444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0266ed37d3b47c8fff77b8d33f9892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a3523124e4d6c56e02631b3013ec9b9.png)
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解题方法
8 . 在
中,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392aacfacbb2e65fe1c957370f1a08df.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3578b63c5903089595bf324c809a997c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392aacfacbb2e65fe1c957370f1a08df.png)
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2024-04-17更新
|
318次组卷
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9 . 若
,则
的值______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02bb083439549baed62b2f260f44e4ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62d85b6a82ae010190919df45f9d455.png)
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2024-04-13更新
|
295次组卷
|
3卷引用:甘肃省武威第十八中学2023-2024学年高一下学期期中考试数学试卷
甘肃省武威第十八中学2023-2024学年高一下学期期中考试数学试卷北京市顺义牛栏山第一中学2023-2024学年高一下学期4月月考数学试卷(已下线)专题04 三角恒等变换-期末考点大串讲(人教B版2019必修第三册)
2024·全国·模拟预测
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10 . 已知复数
(
为虚数单位),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d938e92eb228f6478890f1f471c8bb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c4bc40759dea343d38f0ead1bc8a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d938e92eb228f6478890f1f471c8bb.png)
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