20-21高一·全国·课后作业
1 . (1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2943e8dfff0e441e3107a319ad368072.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c952191ea1ed42d3b5797ec9ac5ab4d.png)
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2021-11-12更新
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445次组卷
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3卷引用:第十章本章回顾
20-21高一·全国·课后作业
2 . 如图,在等腰直角三角形
中,
,点
,
将
三等分,求
,
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b400a6c61254b81d4ccc5a2a7cf4c967.png)
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20-21高一·全国·课后作业
解题方法
3 . 如图, A, B是单位圆O上的点,且A点坐标为
, B在第二象限, C是圆O与x轴的正半轴的交点,△AOB为正三角形,求tan∠BOC的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e01dbe21fe74f2e9babfadd8b09baf.png)
![](https://img.xkw.com/dksih/QBM/2021/11/11/2849050733297664/2849204611604480/STEM/d3e9a131331e4e778f296bad82087c4e.png?resizew=191)
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20-21高一·全国·课后作业
4 . 如图,在正方形ABCD中,P,Q分别在BC,CD上,且
,利用两角和(差)的正切公式证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c7a1488c16cb30a6409c6b35de15d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e13889db9188c455a3ac91f2f32cf7.png)
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20-21高一·全国·课后作业
5 . 已知
,
,且
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc282dae4ac9132196ac5d13f63b901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ae955c9387d83dea2a7f092208f84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852fa088d3b348c8a418ab5c3b977ab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f584f913b804131ad1a7c6b67e14cb03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78aa9e3a24b40d57a6b5a179de171b9.png)
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20-21高一·全国·课后作业
6 . 证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5dcd24d67c9587ff7acfaaf0da97e3.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5dcd24d67c9587ff7acfaaf0da97e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140fe157810e4ec1e86cab53f284ef07.png)
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20-21高一·全国·课后作业
7 . 证明:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ccc59669756b7a951d57b5d5ba00dd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f95dc8a625aa03626e5ad64ace59a8c.png)
您最近一年使用:0次
20-21高一·全国·课后作业
8 . 如图,在某开发区内新建两栋高楼AB,CD(AC为水平地面),P是AC的中点,在点P处测得两楼顶的张角
,
.试求楼CD的高度(测量仪器的高度不计).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1d0963bbe4d4d8eda2210585fc1d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec90788d3e619fefe4a6c2b13d6272ff.png)
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20-21高一·全国·课后作业
解题方法
9 . 化简:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b333018c5b53b582853f182a16d234.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34eb0fcbb31bb957a48fd66e705e2c10.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799063c045a01cd76573359850ef1c5c.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea1ae350f5e8bf5a4f967f7fbb61534.png)
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20-21高一·全国·课后作业
10 . 化简:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859b0ad42e0e6839246cbd1ac73437e9.png)
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