1 . 如图,渔船甲位于岛屿A的南偏西60°方向的B处,且与岛屿A相距12海里,渔船乙以10海里/小时的速度从岛屿A出发沿正北方向航行,若渔船甲同时从B处出发沿北偏东
的方向追起渔船乙,刚好用2小时追上,此时到达C处.
(2)求
的值;
(3)求角
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
(3)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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21-22高二·全国·课后作业
解题方法
2 . 如图,已知三个平面
相交于点O,且
,求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8234872407bafee99086252dfe436b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74ef7630e75be43e4b5f4dbe429229e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa3a310c1f8a5af35dc3328d874e18e.png)
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21-22高二·全国·课后作业
解题方法
3 . 如图,已知
是正方体,E,F分别是棱
的中点,求直线
与
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5307e04a84a0621e4d5bd2aaa1980ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
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4 . 在
中,已知
,则C=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6230e5adeabad4a6947b6948a4ff3191.png)
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5 . 下列叙述错误的是( )
A.![]() | B.若![]() ![]() |
C.若![]() ![]() | D.![]() |
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23-24高二上·上海·课后作业
6 . 根据下列方程,判定直线
与
的位置关系,若相交,求出夹角.
(1)
,
;
(2)
,
;
(3)
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15d419ac2b9832ef6fb704d98790487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db191a381bcc131aad1216844cfe0fc.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00b8eb5fee88a104b321d1c2d5c5b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0031a6f0727e81ec9966c95fb2a5eb12.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83342b9d257e062198077c2897e77dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5810390abd0a156828293ad5885442d8.png)
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7 . 已知向量
,
,则
与
的夹角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5fafcc824b5cfb2d830a9e0adc2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9168209fbda90f3027142bbdcb242a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
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8 . 已知
,
,则x等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f848c41bed61900b3f790819e63548c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2621d48a537fc1faee1949bcb9e5b49.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-02-21更新
|
465次组卷
|
2卷引用:人教B版(2019) 必修第三册 逆袭之路 第七章 7.3 三角函数的性质与图像 7.3.5 已知三角函数值求角
9 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f1eefdf01c45f7d4e6cbe97d0a4526.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f1eefdf01c45f7d4e6cbe97d0a4526.png)
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10 .
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3137c8d8c2857f09e0fcbe14e57528b6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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