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nickymarden Group Title

A vector v forms with axis 0x and 0y the angles alpha=120º and beta=45º. What angle does v make with 0z? i know the answer is gama=45º, but how do i get there?

  • 2 years ago
  • 2 years ago

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  1. nickymarden Group Title
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    is anyone gonna answer this? i really need it.

    • 2 years ago
  2. dumbcow Group Title
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    having little trouble working it out...hold on

    • 2 years ago
  3. nickymarden Group Title
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    ok :)

    • 2 years ago
  4. nickymarden Group Title
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    just leave it, thanks for the time.. :)

    • 2 years ago
  5. nickymarden Group Title
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    fooound it. cos^2alpha+cos^2beta+co^2gama=1

    • 2 years ago
  6. eliassaab Group Title
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    \[\cos^2(\gamma) =1 - \cos^2(\alpha) - \cos^2(\beta) =\\ 1- \frac 1 4 - \frac 1 2=\frac 14\\ \beta = 30 \]

    • 2 years ago
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