1 . 在平面直角坐标系中,以坐标原点为极点,
轴的非负半轴为极轴且单位长度相同建立极坐标系,若直线
(
为参数)被曲线
截得的弦长为
,则
的值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd6716a556522b7ef0d2250d479da13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075115a5bc60e9eae149cfae175994fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2019-03-31更新
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2卷引用:【区级联考】天津市和平区2019届高三下学期第一次质量调查数学(理)试题