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Given 2 Vectors in the form of (x,y,z), and given the angle between them. Resultant?

  1. Dec 18, 2011 #1
    1. The problem statement, all variables and given/known data

    Given two vectors(d and e) in the form of (x,y,z), and given the angle between the vectors, how do you find the resultant vector (a)


    2. Relevant equations
    Cosine equation


    3. The attempt at a solution
    I know that we can use cosine law some how?
     
  2. jcsd
  3. Dec 18, 2011 #2
    Re: Given 2 Vectors in the form of (x,y,z), and given the angle between them. Resulta

    if the resultant vector is what I think it is (either the vector that goes from the origin to the end of d+e or the vector that goes from the end of d to the end of e) then you don't need to use the law of cosines, you can just add/subtract the vectors d and e from each other

    you would have to use the law of cosines of you only have the magnitude of d and e though
     
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