在△ABC中，∠C=90°，AB=15，sinA=13，则BC等于_刷题宝

题干

在△ABC中，∠C=90°，AB=15，sinA=

1

3

，则BC等于（　　）

A：45

B：5

C： $\frac{1}{5}$

D： $\frac{1}{45}$

上一题下一题 0.0难度选择题更新时间:2017-11-11 01:46:24

答案(点此获取答案解析）

B

同类题1

综合性学习。

为纪念世界反法西斯战争胜利65周年，班级开展一次以“战争与和平”为主题的综合性学习活动，请你参与准备工作，完成下列题目。

同类题2

下列有关桃的花和果实的叙述中，正确的是（）

①受精卵发育成种子

②花的主要结构是雄蕊和雌蕊

③花和果实属于生殖器官

④果实是由胚珠发育而来的．

同类题3

下面各图是由几个角组成的？

____个

同类题4

人患急性肠胃炎，造成严重缺水的最主要的原因是（　　）

同类题5

( A )

Report Card
Name: James Smith		Time: January 24^th, 2015
Subjects	Grades	Comments(评语)
English	B＋	Your reading and writing are good. But you have a strong accent(口音), so you are not good at speaking. And you do not put much effort into this subject. If you work hard, you can get a better grade in this subject.
Physics	A＋	You are good at this subject. You are hardworking. I am glad that you do best in this subject.
Math	C	You like this subject. But you are not good at this subject because you are a little lazy. It is disappointing.You can do better if you try your best.
Music	B	It is a happy thing to hear you play the piano. You are crazy about music. Although you like this subject best, your accent has a bad influence on your singing.

阅读以上成绩单，根据表格内容完成以下问题

小学学科试题库

初中学科试题库

高中学科试题库