如图,在平面直角坐标系
中,以
轴的非负半轴为始边的锐角
的终边与单位圆相交于
点,已知
的横坐标为
.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899347351330816/2904288200179712/STEM/7b19ce82-ba1b-4cd3-ab75-994acff16983.png?resizew=171)
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899347351330816/2904288200179712/STEM/7b19ce82-ba1b-4cd3-ab75-994acff16983.png?resizew=171)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f798a9af75a091a8be0b71f2038260.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c3f4f62f32be303b1a7d1843c99237.png)
更新时间:2022-01-28 17:32:22
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解题方法
【推荐1】已知点
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(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
(2)
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(1)
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(2)
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【推荐2】已知角
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐3】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147ae8514d20d9efc9ca7f790b8b21b3.png)
(1)设角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/573e1c0d7cedbd7581b8401d64fdba44.png)
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(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e7c0c5f070e3f91426270a7b9bd8e0.png)
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【推荐2】(1)已知
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