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-计算题
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适中
(0.65)
【推荐1】(1)计算:
;
(2)先化简:
,然后从0,1,
三个数中任选一个求出式子的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140a23b59683535d78b9d564247ed401.png)
(2)先化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e4b63d428ae06293de83e45f628b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
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