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1 . 正弦最初的定义(称为古典正弦定义)为:在如图所示的单位圆中,当圆心角
的范围为
时,其所对的“古典正弦”为
(
为
的中点).根据以上信息,当圆心角
时,
的“古典正弦”除以
的可能取值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083479b94380e8d659eff92d10a1989d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5caabda288fc01cc168938846eec5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/21/41eaa128-da39-4419-8229-93dcd3900762.png?resizew=124)
A.1 | B.![]() | C.![]() | D.0 |
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解题方法
2 . 在锐角
中,角
的对边分别为
,且满足
,
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8da113a2bbdfdda01ff5425e02d4c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42289c220e9f084ad9c37f607de9b766.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2024-05-12更新
|
528次组卷
|
2卷引用:江苏省连云港市东海县2023-2024学年高一下学期期中考试数学试题
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解题方法
3 . 给出以下命题正确命题的选项为( )
A.不等式![]() ![]() ![]() |
B.函数![]() |
C.定义运算![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.函数![]() ![]() ![]() ![]() |
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