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So for example I defined p, remember back over here, as a Cartesian point, but I can actually ask for its polar form.
我可以要求返回它的极坐标形式，这里对我是可访问的，好，这很棒，请再记另外一个为什么。
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And if I go look at the polar form of this, OK, good, looks right, right?
现在它有一个不同的坐标，以及跟原来相同的角度？
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If it's in polar form I passed in a radius and angle and I'll compute what the x- and y- value is.
以及半径和角度,但是现在是这样的,不管我是以哪种形式。
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The second problem is, 1 suppose actually I had p 1 and p 2 were in polar form, and I ran add points on them.
第二个点也就是，半径为3角度为1,也就是差不多在这，那么什么点，对不起。
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How do you know whether it's in Cartesian form or in polar form?
这没什么了不起的,但是现在出现问题了？
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If I now say, I'm going to go ahead and change the radius of this, something, my polar form did it right, but what happened to the Cartesian form?
如果我现在说，我要去改变这里的半径,一些这样的操作，我的极坐标形式，进行了正确的改动？
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