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    gabrielle10's Avatar
    gabrielle10 Posts: 1, Reputation: 1
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    #1

    Feb 15, 2008, 05:56 PM
    Trigonometry and vectors
    How do I find the magnitude and direction angle for vector <-5,12>
    iamthetman's Avatar
    iamthetman Posts: 105, Reputation: 8
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    #2

    Feb 17, 2008, 12:25 PM
    (Assuming the one co-ordinate is zero), make a triangle with points (0,0), (-5, 12) (-5, 0) [the x-axis].
    Find the value of the hypotenuse for the value of the magnitude (a^2 = b^2 + c^2).
    Find the slope to fnd the dirrection angle (rise divided by run).

    - Not by Tman, by Tman's brother-in-law.
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