WEBVTT
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Let's try toe derive this again. We first right
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R t is given by given by this except the
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wild T It's truly anyth I mentioned, but for
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simplicity are right Should I mention if you wantto do
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in St Amon changes at another component The derivative should
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be ex private t y proud t So I will
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be this integration. This integration will be from a
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to B the dot product off them plus why off
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t y prompt e However what is this? This
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one If you observe that or you can just observe
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from the final from not that ex off t square
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If you take the derivative with respect with tea,
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you should get exactly X off t. Well,
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you have a chewing from ex prompt he by the
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general. So this is nothing but or or even
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just observing something by by U substitution. And so
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the first part below the antiterrorist tiff, Opie with
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respect to Teo bx and sub t square over too
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crosswise of t square over two from a to B
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and this is not on x X square, plus
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y square is just are absolutely off our square.
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So this is our square over too, from a
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to B And this one after you probably be in
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a you should guess this.