(Ⅰ)已知
,且
为第四象限角,求
的值;
(Ⅱ)计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce4560edda625959180c00289dfd9d4.png)
(Ⅱ)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebffc2e884b22c4ad8923e5696b6fc8a.png)
更新时间:2020-02-13 23:01:45
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