What is the dot product of $< 5, 4, - 4 >$ $<5,4,-4>$ and $< - 4, 1, 5 >$ $<-4,1,5 >$ ?

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What is the dot product of $< 5, 4, - 4 >$ $<5,4,-4>$ and $< - 4, 1, 5 >$ $<-4,1,5 >$ ?

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Answer 1 · 2016-03-03T19:38:49

$a \cdot b = 4$ $a*b=4$

Explanation:

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$a = < 5, 4, - 4 > b = < - 4, 1, 5 >$ $a=<5,4,-4>" "b=<-4,1,5>$
$a \cdot b = 5 \cdot (- 4) + 4 \cdot 1 + (- 4) \cdot 5$ $a*b=5*(-4)+4*1+(-4)*5$
$a \cdot b = - 20 + 4 - 20$ $a*b=-20+4-20$
$a \cdot b = 4$ $a*b=4$

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What is the dot product of $< 5, 4, - 4 >$ $<5,4,-4>$ and $< - 4, 1, 5 >$ $<-4,1,5 >$ ?

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Explanation:

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What is the dot product of <5,4,−4><5,4,-4> and <−4,1,5><-4,1,5 >?

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Explanation:

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What is the dot product of $< 5, 4, - 4 >$ $<5,4,-4>$ and $< - 4, 1, 5 >$ $<-4,1,5 >$ ?