计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f522301a15c3adb8bd282299696389.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937fb85e86b6804533630c543d62492a.png)
更新时间:2018-05-09 06:09:04
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相似题推荐
解答题-问答题
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适中
(0.65)
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【推荐1】如图,在平面直角坐标系内,点O为原点,点A在x轴的正半轴上,点B在第一象限内,且AO=BO=10,tan∠BOA=
.
(1)求点B坐标;
(2)求cos∠BAO的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
(1)求点B坐标;
(2)求cos∠BAO的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/92ce966d-1574-4601-925c-2192a0ce7c7e.png?resizew=285)
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解答题-问答题
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适中
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【推荐2】把下列各式化为最简二次根式:
(1)10
.
(2)
.
(3)(
)(
).
(4)
.
(1)10
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f66757a20393c56f6d7225e0ce08bec.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb8d58266dd6d4428f60abb528b0714.png)
(3)(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d1df3af8b2e212bc6d114959139823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650ef902d427468119ea4f00fc2717ee.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0acb38ce8326bb1a6f20aeb1abc8542.png)
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解答题-计算题
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适中
(0.65)
【推荐1】计算
(1)2
-2
+3![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21537392d07536c50c3b30769d064463.png)
(2)(
)(
)
(3)
+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425095f27a70af3ac9017e65eb95116c.png)
(4)
+|3-
|-
+(
)-1
(1)2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21537392d07536c50c3b30769d064463.png)
(2)(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b1b0ded7c50ac6c176c3d7e1be81c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b6e12de6c64c376b5dadf663edee46b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a1be7becedc3fbae957f8db0af0c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425095f27a70af3ac9017e65eb95116c.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c54659bc15c2cdf68945dedb1efeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2316128280406fc2d42a27c8f0336f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e6c9e0d883130ed912bc4913ccbb6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb84f6fbac102ccf326b2223d69cb7cc.png)
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解答题-计算题
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适中
(0.65)
名校
【推荐2】(1)计算:
:
(2)先化简,再求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66837383ef8776fa6b29ccdc90b40ff.png)
(2)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70f026855cb62c346f7bdb1fac86212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982e022d1d403914e5820423af742aa4.png)
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