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anonymous

  • one year ago

SIMPLE MATRIX QUESTION PLEASE HELP!! are the given vectors normal? a = (5,-2) and b = (6,15)

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  1. anonymous
    • one year ago
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    @GEERKY42

  2. anonymous
    • one year ago
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    @sithsandgiggles

  3. anonymous
    • one year ago
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    @jagr2713

  4. anonymous
    • one year ago
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    @freckles

  5. anonymous
    • one year ago
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    @whpalmer4

  6. anonymous
    • one year ago
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    @greg_d

  7. anonymous
    • one year ago
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    is the question asking if they are perpendicular to each other?

  8. anonymous
    • one year ago
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    @greg_d all it is asking is if it is "normal"

  9. anonymous
    • one year ago
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    I can't determine what or why or how it would be considered normal.. the rest of the homework was working on matrices

  10. anonymous
    • one year ago
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    if the question is, are they "normal" (as perpendicular) to each other, you can use the dot product...

  11. anonymous
    • one year ago
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    This is honestly the last problem and i don't know how i could do that..

  12. anonymous
    • one year ago
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    @greg_d

  13. anonymous
    • one year ago
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    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 90º and they are indeed "normal" to each other

  14. anonymous
    • one year ago
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    could you possibly solve that for me so i can use it next time i see something like this?

  15. anonymous
    • one year ago
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    @greg_d

  16. jim_thompson5910
    • one year ago
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    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

  17. jim_thompson5910
    • one year ago
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    In general u = <a,b> v = <c,d> u dot v = a*c + b*d u,v are vectors a,b,c,d are scalars

  18. anonymous
    • one year ago
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    @jim_thompson5910 @greg_d Thank you!!

  19. anonymous
    • one year ago
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    :D that examples will lead you to the answer !

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