Properties of the Dot Product...1

Discussion in 'Geometry and Trigonometry' started by nycmathguy, Feb 4, 2022.

  1. nycmathguy

    nycmathguy

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    Section 6.4

    Screenshot_20220204-114019_Samsung Notes.jpg

    IMG_20220204_121720.jpg

    IMG_20220204_121748.jpg
     
    nycmathguy, Feb 4, 2022
    #1
  2. nycmathguy

    MathLover1

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    you made mistake at 2[-6]w, should be -12w, not -18w
     
    MathLover1, Feb 5, 2022
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    nycmathguy likes this.
  3. nycmathguy

    nycmathguy

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    Thank you for pointing out my errors.
     
    nycmathguy, Feb 5, 2022
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  4. nycmathguy

    Country Boy

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    The problem also said "state whether the answer is a scalar or a vector" but you did not do that.
     
    Country Boy, Feb 6, 2022
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  5. nycmathguy

    nycmathguy

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    The result is a scalar.
     
    nycmathguy, Feb 6, 2022
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  6. nycmathguy

    Country Boy

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    NO, it is not! And your mistake is much worse than just -18 instead of -12.
    -18< 3, -1> is NOT the scalar -18(3)+18= -36. It is the vector <-18(3), -18(-1)>= < -54, 18>.
     
    Country Boy, Feb 6, 2022
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  7. nycmathguy

    nycmathguy

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    I see my error. It's a vector.
     
    nycmathguy, Feb 7, 2022
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