计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe49de0ebc9b03a199858bf9d9dff0a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf005860fc7ee0f4b9222972a10c1ab7.png)
更新时间:2023-07-16 16:15:37
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【推荐1】计算
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(2)如图,∠ACB=90°,CD⊥AB,垂足为D.求证:∠ACD=∠B.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d999b2976782f9dda355e1a52456f02.png)
(2)如图,∠ACB=90°,CD⊥AB,垂足为D.求证:∠ACD=∠B.
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