20-21高一·全国·课后作业
1 . 如图,屋顶的断面图是等腰三角形ABC,其中
,横梁AC的长为定值
,
.试问:当
为多大时,雨水从屋顶(屋顶面为光滑斜面)上流下所需的时间最短?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b400d0f1815cb5953b1221ce690caef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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20-21高一·全国·课后作业
2 . 用
表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8accc550386fd2a868e3f0e0faa285a.png)
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20-21高一·全国·课后作业
解题方法
3 . 证明:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca93d1ec98e39bd95037eaace89fb55.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61eee8faf7606eb0e82af36a81ed4390.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d89e04ff34cbeb0fc0a3ded0428dd63.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4d54de2911060359364314af22be54.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5e7ba849ebd568c2843e77bdd884f4.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc4cc465b42e6e8386b88c5170131d8.png)
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20-21高一·全国·课后作业
解题方法
4 . 已知
,
,试确定角
所在的象限.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fb57c4b7198d4aef63c8c202ae0734.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75d64552c04e1d0ef1aef96d2d08489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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20-21高一·全国·课后作业
名校
解题方法
5 . (1)已知
,求
的值;
(2)已知
,求
的值.
(3)已知
,化简
;
(4)已知
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a077ceccea768ed3c664d38d55242fbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62a672ab7f4b851739953dac279fa49.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24de17d02b528fb76ffd57c3751809ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59293fd84aa30bd783d0f89e7c52e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f87b02248cd2330ec1772af78f14b830.png)
(4)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd65ed252e0bb1f45da655e1cc3e540b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b533a43b04f05dc7fe245d6c299b0754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673f7e66c2a252da4c77c70d90c8cec.png)
您最近一年使用:0次
2021-11-11更新
|
372次组卷
|
5卷引用:10.2 二倍角的三角函数
(已下线)10.2 二倍角的三角函数(已下线)专题5.6 两角和与差的正弦,余弦和正切公式-《聚能闯关》2021-2022学年高一数学提优闯关训练(人教A版2019必修第一册)苏教版(2019)必修第二册课本习题 习题10.2山东省青岛第十七中学2023-2024学年高二下学期期初考试数学试卷 (已下线)专题09 二倍角的三角函数 几个三角恒等式-《重难点题型·高分突破》(苏教版2019必修第二册)
20-21高一·全国·课后作业
6 . 已知
,且
,求
,
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833761c35ba09568134dc5246f547ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55ae7d387e6540a5d12ef870a930802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677ff28e831e00633bd3436917738b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2299ba5cf99190839081e3ccd0908cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c8d3ed07ab17b305b30bbd11c8afd09.png)
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20-21高一·全国·课后作业
解题方法
7 . 化简:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7454e51df8f7302fc72bae7294b9e2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818ea14fa890729cca489d9a986d7067.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee5116cbc8cf32e52d3e8d047f03e919.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d7933f39af0bbc2150bcdd90543a60.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e877296250ffd71e295178822b672a5.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a183baed01362efd0b02422f5a712925.png)
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8 . 求下列各式的值:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5864395854bfc5177b57e64049d771.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1ca5d06303b22281a55e73068cb6af.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/399c33d1432ab6f1b20f5d431e143d42.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69ab1090439a5bada4a4f8a299e9313.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92878cac2de066d70b1e7cd8dc577610.png)
您最近一年使用:0次
20-21高一·全国·课后作业
9 . 已知
,
,且
,
都是锐角,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852fa088d3b348c8a418ab5c3b977ab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c98ce1bd8a5ffe3e18b4033d4ade5d.png)
![](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/fbfea1e888676a13ad69c72fba0405ea.png)
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20-21高一·全国·课后作业
解题方法
10 . 化简:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28cdc8b009864181549a24ae962213c8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7343a3a261fe8af5bc70e4b0b9f053c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375fe7c75463340617f1ad614a916e03.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5463992d9b74153dd22410d88821414f.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e33f54c29545514ab49af35328bb73.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e048b4b3b3260bdd3df7fe396cadeb.png)
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