1 . 在“立体几何”知识中:①两直线所成角的取值范围是
;②直线与平面所成角的取值范围是
;③二面角的平面角取值范围是
.在“解析几何”知识中;④直线的倾斜角取值范围是
;⑤两直线的夹角取值范围是
;在“向量”知识中:⑥两向量的夹角的取值范围是
;以上概念叙述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa898d5280ab56f52aeedc2cce370bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff14bdd7f2b48c0ce6ba8696c89fbf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cfcbb5c5950e18a8452b38bb17036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b1d28a098ea5555c89b332fad25b96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/917ae6fcf56fa6b4fc9852854cd8f78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cfcbb5c5950e18a8452b38bb17036.png)
A.②①④⑤ | B.②③④⑥ | C.③④⑤⑥ | D.②③④⑤ |
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2 . 直线
(
为常数,且
),则直线倾斜角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251dff989f7d60db751b73033dee269.png)
________ (结果用反正切表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cff0bbf16b63e3ee0d68f2ab8f9236d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ed37ee7432002cd0e0978b2012e184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251dff989f7d60db751b73033dee269.png)
您最近一年使用:0次