WEBVTT
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welcome to this lesson in this lesson, we will
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look for the unit Vector that is also going out
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to both vectors A and B. Yeah. Okay
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, so we'll look for actually two unit vectors.
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If you go now to A and B less than
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make use of the cross border at that is the
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determinant of a matrix, starting with I j and
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K component. Then then this rule as the entries
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of a mattress. Uh, the vector A.
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The second part is the increase of the Victor B
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. Mm. So eight Crosby making good use of
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the Cooper terminated where we delete the first road.
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The second column. So you have to one 10
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then minus G, we delete the first rule.
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The second column me after a sorry negative. One
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10 Last but not least, is the K part
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where we delete the first rule in the third column
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. So we have three negative. One, two
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, and one. Cool. Mhm. Okay,
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let's go. Also, a Crosby is equal to
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I out then two times, everybody's Sarah minus one
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times one. That is negative. One. Yeah
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. This area of three times zero that is zero
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than one times. Okay. One so negative.
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One times. One. Yeah, that is a
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positive. Okay, So a positive Because you have
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negative minus negative. One times. One. It's
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a positive one. And class K, that is
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very minus negative. One times two. Okay,
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so that we have a Cosby given us. Negative
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. I negative. J don't Glass. Yeah,
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last five. Okay. Okay, so this is
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a better. Now we look for the unit vector
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of this vector, and it's just nothing by the
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magnitude of vector. So this becomes negative. One
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to the power to negative one to the bar to
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again and five to about two. So the mic
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tattooed, that is one last one last 25.
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So the whole thing is crude of 27 and that
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is called Three Square Root of three. Because we
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have nine times story. Let's call it off.
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Let's do it that way. You have nine screwed
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of three. That gives us three screwed of three
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. Okay, so the union victor you're looking for
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is a cross be over a cross, be magnitude
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, and that gives us Yeah. Negative one.
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Minus negative. G 10 plus five key all over
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three square root of three. Okay, So the
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other, the other part is the negative of the
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whole of this. Yeah, that part was the
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negative of the whole of that. And that is
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I Last year, U minus five key all over
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a tray. Screwed of training all times for a
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time. This is the end of the lesson.
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Mhm.