名校
1 . 设函数
.
(1)在给定的平面直角坐标系中,用“五点法”画出函数
在区间
上的简图(请先列表,再描点连线);
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc7dcce7d1b1d24c6dc00393bb5c461.png)
(1)在给定的平面直角坐标系中,用“五点法”画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebaafc3367b396521cb155e321e2e89c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80c4dc6281e3ed122c0a771c1731529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb31ad87278a4c1f194b073bee4daf0.png)
您最近一年使用:0次
2024-01-30更新
|
323次组卷
|
2卷引用:广东省广州二中2023-2024学年高一上学期期末数学试题
解题方法
2 . 设函数
.
![](https://img.xkw.com/dksih/QBM/2021/2/3/2650134506438656/2652195549478912/STEM/adf8b047-6218-40a1-bfa5-d93f256dff90.png?resizew=456)
(1)在给定的平面直角坐标系中,用“五点法”画出函数
在区间
上的简图(请先列表,再描点连线);
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4acaa0895b13b3b5535db30eea3b62.png)
![](https://img.xkw.com/dksih/QBM/2021/2/3/2650134506438656/2652195549478912/STEM/adf8b047-6218-40a1-bfa5-d93f256dff90.png?resizew=456)
(1)在给定的平面直角坐标系中,用“五点法”画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354306addbb548f0697f04165708beeb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80c4dc6281e3ed122c0a771c1731529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb41487af6c061cafe7abe2ee3237877.png)
您最近一年使用:0次
3 . 如图,在直角坐标系xOy中,角
、
以Ox为始边,其终边分别交单位圆于点A、B.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/3ea6b15e-49ce-447f-b59e-5b0c5368a5c0.png?resizew=179)
(1)已知角
以Ox为始边,终边交单位圆于点C,试在图中作出点C(写明作法),并写出点C的坐标;
(2)根据图示,推导两角差的余弦公式:
;
(3)由
推导两角和的正弦公式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/3ea6b15e-49ce-447f-b59e-5b0c5368a5c0.png?resizew=179)
(1)已知角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd927b4b5a7875528c1b54aa4bb8b2dd.png)
(2)根据图示,推导两角差的余弦公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5529fff3ef760fba7bc1ba8a54ebca7a.png)
(3)由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5bcf44b6a1dd4daf8eca077ff72d4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a1f5cd8cede3f9d2ea104807b66bd7.png)
您最近一年使用:0次