已知角
的顶点与原点O重合,始边与x轴的正半轴重合,它的终边过点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c111a7b669770a2cc28e403ade76169.png)
(1)求
的值;
(2)若角
满足
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c111a7b669770a2cc28e403ade76169.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08743aa53f8bf8b28ff05f0c13386270.png)
(2)若角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e4fc7489911b0da3cc5d7194d9c6a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b04da7eac640b5b735da7fb5da8cfd.png)
更新时间:2023-05-10 22:02:08
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解题方法
【推荐1】在平面直角坐标系中,角
的顶点与原点
重合,始边与
轴的非负半轴重合,且
,终边上有两点
.
(1)求
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(2)若
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(1)求
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4821384ecd24b5fabf7d50a5d997e6.png)
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【推荐2】在平面直角坐标系xoy中,角α的顶点在原点,始边在x轴的正半轴上.
(1)若
,且α的终边与单位圆的交点的横坐标为
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f102439ebd1efd422f04209ecec2bf.png)
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(2)若tanα=2,求
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解题方法
【推荐1】已知
,且
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(1)求
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(2)求
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(3)求角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8132c15d7581640d921e49e586fc3e0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8683ba2e150471174a6915494b3593.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14593b0e397cd43b5a961f1ac497a5b1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
(3)求角
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(2)若
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(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd979253d2e8581c89968b62e940702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐1】如图,某公园摩天轮的半径为40m,圆心距地面的高度为50m,摩天轮做匀速转动,每3min转一圈,摩天轮上的点P的起始位置在最低点处.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/d0bc5ca6-ff33-4ffa-bfa0-4949b919f82c.png?resizew=183)
(1)已知在时刻t(单位:min)时点P距离地面的高度
(其中
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解析式及2023min时点P距离地面的高度;
(2)当点P距离地面
m及以上时,可以看到公园的全貌,求转一圈中有多少时间可以看到公园的全貌?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/d0bc5ca6-ff33-4ffa-bfa0-4949b919f82c.png?resizew=183)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921ae01cb5d5db3513419fb616e6a3bd.png)
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(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c871debfd2b8a233e7068bb5156da0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05214228fa749e86fa46041e7437563d.png)
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