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anonymous

  • one year ago

vector= <-3,4> vector u= <2,5> medal!!! find u-v find -2v find u times v find the magnitude and direction of u

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  1. Loser66
    • one year ago
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    |dw:1433551562751:dw| right?

  2. anonymous
    • one year ago
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    yep @Loser66

  3. Loser66
    • one year ago
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    |dw:1433551686065:dw|

  4. anonymous
    • one year ago
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    1

  5. Loser66
    • one year ago
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    yup

  6. anonymous
    • one year ago
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    then for -2v?

  7. Loser66
    • one year ago
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    |dw:1433551751106:dw|

  8. anonymous
    • one year ago
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    0

  9. anonymous
    • one year ago
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    @Loser66

  10. Loser66
    • one year ago
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    how??? (-2)*(-3)= 6 (-2)*4 = 0?????

  11. anonymous
    • one year ago
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    -8 my bad

  12. Loser66
    • one year ago
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    ok

  13. anonymous
    • one year ago
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    and for the next for is it -6,20

  14. Loser66
    • one year ago
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    noooooooooooooooooope in vector, you don't have multiplication . YOu only have dot product; it is not multiplication

  15. anonymous
    • one year ago
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    wait what

  16. Loser66
    • one year ago
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    \(\vec u\bullet \vec v\)

  17. Loser66
    • one year ago
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    it is not "times" . It is dot product.

  18. anonymous
    • one year ago
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    how do u do that

  19. anonymous
    • one year ago
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    (-6) + 20 = 14

  20. Loser66
    • one year ago
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    = first u * first v + second u * second v where u = < first, second> and v = < first, second>

  21. Loser66
    • one year ago
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    yup, you are correct

  22. anonymous
    • one year ago
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    and i don't get the find the magnitude and direction of u

  23. Loser66
    • one year ago
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    \(||\vec u||= \sqrt{first ^2 + second^2}\)

  24. anonymous
    • one year ago
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    so 7

  25. Loser66
    • one year ago
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    redo

  26. anonymous
    • one year ago
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    27?

  27. Loser66
    • one year ago
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    direction of u : hit the calculator: \(tan^{-1}\), after the menu pop up, type \(\dfrac{second}{first}\) then enter for magnitude of u : \(\sqrt{2^2 + 5^2 }=???? \)

  28. anonymous
    • one year ago
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    i can't find my calculator

  29. Loser66
    • one year ago
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    use google

  30. anonymous
    • one year ago
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    i get seven

  31. anonymous
    • one year ago
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    http://www.wolframalpha.com/input/?i= √2%5E2%2B+√5%5E2

  32. anonymous
    • one year ago
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    @Loser66

  33. Loser66
    • one year ago
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    OMG!!! \(||u||= \sqrt{29}\)

  34. anonymous
    • one year ago
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    lol thank;)

  35. Loser66
    • one year ago
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    direction of u is 68.2 degree

  36. anonymous
    • one year ago
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    thanks again

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