如图,矩形台球桌ABCD,其中A、B、C、D处有球洞,已知DE=4,CE=2,BC=6
,球从E点出发,与DC夹角为α,经过BC、AB、AD三次反弹后回到E点,则tanα的取值范围( )
![](https://img.xkw.com/dksih/QBM/2021/1/14/2636034374598656/2636561960935424/STEM/fc47bdffc56b45e2b49f38459174f9b0.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2021/1/14/2636034374598656/2636561960935424/STEM/fc47bdffc56b45e2b49f38459174f9b0.png?resizew=164)
A.![]() ![]() | B.![]() ![]() |
C.tanα=![]() | D.![]() ![]() |
2021九年级下·全国·专题练习 查看更多[2]
更新时间:2021-01-15 11:21:57
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【知识点】 解直角三角形的相关计算解读
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