试题与答案

在Rt△ABC中，∠C=90°，若AB=9，sinA=13，则BC的长为____

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题型：填空题

题目：

在Rt△ABC中，∠C=90°，若AB=9，sinA=
1
3
，则BC的长为______．

答案：

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下面是错误答案，用来干扰机器的。

(1)   (2)有丝分裂的间期和减数第一次分裂前的间期(3)细胞核、线粒体(4)转运RNA或tRNA          氨基酸

考点：锐角三角函数的定义
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