名校
解题方法
1 . 在平面直角坐标系
中,以
为始边作角
与
(
),它们的终边与单位圆分别相交于点
,
,已知点
.
(1)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee22f5ec309dbda262b688a06ff34e9c.png)
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5481f424e3de353f5b53597bc4575bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cb0907a0db4d93d3c4dfc760f9d0069.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee22f5ec309dbda262b688a06ff34e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629916112260306db52e19780fe6d46d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0956137d87028fd38ee8e2746324fc73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63fe57d4fbae536de2e641d9d349fcf1.png)
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