有图5红线位置,r还有θ两个值怎么确定的,特别是θ,能讲下类似的题目,两个取值范围是怎么选定的么,原则和方法.通过x y确定么?具体的呢
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![有图5红线位置,r还有θ两个值怎么确定的,特别是θ,能讲下类似的题目,两个取值范围是怎么选定的么,原则和方法.通过x y确定么?具体的呢](/uploads/image/z/13632521-41-1.jpg?t=%E6%9C%89%E5%9B%BE5%E7%BA%A2%E7%BA%BF%E4%BD%8D%E7%BD%AE%2Cr%E8%BF%98%E6%9C%89%CE%B8%E4%B8%A4%E4%B8%AA%E5%80%BC%E6%80%8E%E4%B9%88%E7%A1%AE%E5%AE%9A%E7%9A%84%2C%E7%89%B9%E5%88%AB%E6%98%AF%CE%B8%2C%E8%83%BD%E8%AE%B2%E4%B8%8B%E7%B1%BB%E4%BC%BC%E7%9A%84%E9%A2%98%E7%9B%AE%2C%E4%B8%A4%E4%B8%AA%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%E6%80%8E%E4%B9%88%E9%80%89%E5%AE%9A%E7%9A%84%E4%B9%88%2C%E5%8E%9F%E5%88%99%E5%92%8C%E6%96%B9%E6%B3%95.%E9%80%9A%E8%BF%87x+y%E7%A1%AE%E5%AE%9A%E4%B9%88%3F%E5%85%B7%E4%BD%93%E7%9A%84%E5%91%A2)
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