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Math Help - need help

  1. #1
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    need help

    if the magnitude of the vector v= 1/2 and a= 113 degrees
    write the vector v in terms of i and j

    u= 2i -5j w= -i -6j
    Last edited by scrappy; November 13th 2006 at 12:01 AM. Reason: missed something
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  2. #2
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    Quote Originally Posted by scrappy View Post
    if the magnitude of the vector v= 1/2 and a= 113 degrees
    write the vector v in terms of i and j

    u= 2i -5j w= -i -6j
    What does this have to do with u and w?

    In the usual coordinate system:
    v_x = |v|cos(113^o) \approx -0.19537
    v_y = |v|sin(113^o) \approx 0.46025

    So v = -0.915i + 0.460j

    -Dan
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