先化简,再求值:[
-
]÷
,其中x=tan45°-6sin30°.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c37d0e420bf4c0caaaf2c73e3a07a91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95f96525a89a9f773bfd85d09fe1a4d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95fcfaf750395f9e5b843f017aab25d9.png)
更新时间:2017-08-19 12:12:00
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解答题-问答题
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适中
(0.65)
【推荐1】(1)已知
,则
__________.
(2)已知
,则
__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb99cf8f488c74aae41940e57f8e977.png)
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(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641a2d72891fdfcdcc53d7f9da50495c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81ade5cba63dff18d65b24280611824.png)
您最近一年使用:0次
解答题-计算题
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适中
(0.65)
【推荐2】计算:
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;
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;
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,其中
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(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9899f874ddab36d6fcfe9036a2833940.png)
(2)解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f6ed717a897ba7ee38424ce0c4c247.png)
(3)化简并求值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81de5fc7a2830ef648e0c8b2853cc001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
您最近一年使用:0次