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If I look at the Cartesian, oh, I did have the Cartesian form, don't mind me while I mutter to myself here quietly.
如果我来看看这个笛卡尔，哦，我还没有笛卡尔形式，当我自言自语的时候,请大家别介意。
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It's now got a different radius, same angle, so I just changed the radius of it.
我刚刚改变了它的半径，噢，但是对于笛卡尔形式来说。
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Right, and just to get a sense of this, let's look at a simple little example, so on your hand-out, you'll see I've got a little piece of code that says assuming I've got one of these points, I want to do things with it, for example I might want to add them together.
这些数组中的一个，你怎么能够知道，它是哪种类型的呢？,你怎么知道它是以笛卡尔坐标,表示的还是以极坐标,形式表示的呢？,你没有可以用来区分的东西，你没有说明这种信息,聚集实际上的意义。
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Ah yes, didn't change.
但是笛卡尔形式发生了什么呢？
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I should have done this earlier by typing the Cartesian form earlier, so let me go back to where I was, sorry for that, let me go make this a 1 again.
我应该早点通过输入笛卡尔形式,来说明这个的，那么让我回到刚才说到的地方，很抱歉，让我去把，这个a，1再做一遍。
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