在直角坐标系
中,角
的顶点在原点,始边与
的非负半轴重合,终边经过点
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db81446766bb8f493d6fc49e65f0d495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbab69a698bdd22a84613786bba4384.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-06-09 15:36:54
|
相似题推荐
单选题
|
适中
(0.65)
解题方法
【推荐1】在平面直角坐标系中,点
是角
终边上的一点,点
是角
终边上的一点,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98ef6b26186130f8d88c66d3b3c78fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb006ea697b63a914eb487073f0abe1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如果
为锐角且
,那么
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d450aea0fb89e956fc4caa3a9c59fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41da25602982b90537a7624c01bbbe0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8f77412df80e314ee1e5efd6a4b52f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de81df5d2c85dea2509999c13b296d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c3f105583b27d4f7df6e422bf5811a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图放置的边长为1的正方形ABCD的顶点A、D分别在x轴、y轴正半轴上(含原点)上滑动,则
的最大值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/29/78a1bcde-7dd5-4714-b658-1d36de6fe4e8.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540623f49be6594275a02059f6578f7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/29/78a1bcde-7dd5-4714-b658-1d36de6fe4e8.png?resizew=145)
A.1 | B.![]() | C.2 | D.![]() |
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【推荐3】如图所示,边长为1的正方形
的顶点
,
分别在边长为
的正方形
的边
和
上移动,则
的最大值是( )
![](https://img.xkw.com/dksih/QBM/2022/1/9/2890852430258176/2892412220432384/STEM/649187f787434170996991a7d1cb3957.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284750727aa2c32b2477d126daefb329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabffff87192bc780fb6d97d89bfefa5.png)
![](https://img.xkw.com/dksih/QBM/2022/1/9/2890852430258176/2892412220432384/STEM/649187f787434170996991a7d1cb3957.png?resizew=148)
A.4 | B.![]() | C.![]() | D.2 |
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