已知
为锐角,且
.
(I)求
的值;
(II)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d59142ab797807e560fe8adf63e6ecb.png)
(I)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6a96b2ff7e31fc9118b2a6a5182425.png)
(II)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e307446bb2ea7ff1adb30e7c94156b3.png)
更新时间:2017-11-10 20:30:29
|
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解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】已知角
,且角
的终边与单位圆的交点为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e00ef7f5d478e78176df81b587dc472.png)
(1)求
的值;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f201f6e84279e80b85f394f4d930ed41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e00ef7f5d478e78176df81b587dc472.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a282d19bf2c827a98d4443330f7ca1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb11486d3a76018fafff7b4b6c3356a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f65044c12d07e5f37b5e0e68d9f5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e619d36b4b58c13da08ab8f5695bfdfb.png)
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