anonymous
  • anonymous
SIMPLE MATRIX QUESTION PLEASE HELP!! are the given vectors normal? a = (5,-2) and b = (6,15)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@GEERKY42
anonymous
  • anonymous
@sithsandgiggles
anonymous
  • anonymous
@jagr2713

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anonymous
  • anonymous
@freckles
anonymous
  • anonymous
@whpalmer4
anonymous
  • anonymous
@greg_d
anonymous
  • anonymous
is the question asking if they are perpendicular to each other?
anonymous
  • anonymous
@greg_d all it is asking is if it is "normal"
anonymous
  • anonymous
I can't determine what or why or how it would be considered normal.. the rest of the homework was working on matrices
anonymous
  • anonymous
if the question is, are they "normal" (as perpendicular) to each other, you can use the dot product...
anonymous
  • anonymous
This is honestly the last problem and i don't know how i could do that..
anonymous
  • anonymous
@greg_d
anonymous
  • anonymous
ok, IF that is the question, we need to multiply them using the dot product. \[a.b=a_xb_x+a_yb_y\] since\[a.b=|a||b|cos(\theta) \] with theta beign the angle between the vectors. if that product is 0, said angle is 90ยบ and they are indeed "normal" to each other
anonymous
  • anonymous
could you possibly solve that for me so i can use it next time i see something like this?
anonymous
  • anonymous
@greg_d
jim_thompson5910
  • jim_thompson5910
Similar Example: Let's say you had the two vectors u = <1,2> v = <5,7> The dot product of u and v is u dot v = 1*5 + 2*7 = 5 + 14 = 19 Since the dot product is not 0, this means that u and v are not perpendicular
jim_thompson5910
  • jim_thompson5910
In general u = v = u dot v = a*c + b*d u,v are vectors a,b,c,d are scalars
anonymous
  • anonymous
@jim_thompson5910 @greg_d Thank you!!
anonymous
  • anonymous
:D that examples will lead you to the answer !

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