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1 . 已知α∈
,cos α=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
,则tan
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d57582ca0a4c81dd5b8433da0a7816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90080c66ab9f10762d0e8d431ff8f2a5.png)
A.7 | B.![]() | C.-![]() | D.-7 |
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2018-08-29更新
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2046次组卷
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8卷引用:2020届青海省西宁市六校(沈那、昆仑、总寨、海湖、21中、三中)高三上学期期末数学(文)试题