计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8aff957eef3434bd1ff07eb69e0bdb3.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d44df4d738f81a46afab94e179a7bb9.png)
更新时间:2023-08-06 20:22:23
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解答题-问答题
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适中
(0.65)
【推荐2】如图,在
中,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2898049684529152/2917701712527360/STEM/1a6c17af-df7b-43b0-97be-169c6efc286e.png?resizew=240)
(1)求BC的长.
(2)在线段BC上取点M,使
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2898049684529152/2917701712527360/STEM/1a6c17af-df7b-43b0-97be-169c6efc286e.png?resizew=240)
(1)求BC的长.
(2)在线段BC上取点M,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d27dc977cc717bb4958683f9c87de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
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