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Math Help - how to get the vectoric representation..

  1. #1
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    how to get the vectoric representation..

    i have this ellipse formula and i cant see how they got it to be represented in
    sch vectoric way
    by what method?
    formula?
    http://i28.tinypic.com/zlzr04.gif
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  2. #2
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    Quote Originally Posted by transgalactic View Post
    i have this ellipse formula and i cant see how they got it to be represented in sch vectoric wayby what method? formula?
    I am not sure how to begin an answer.
    I think you just have to have studied parametric representations.
    That topic is standard in almost all calculus courses.

    \frac{{x^2 }}{{a^2 }} + \frac{{y^2 }}{{b^2 }} = 1\; \leftrightarrow \;\left( {a\cos (t),b\sin (t)} \right)
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  3. #3
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    i know parametric representation
    there is no vector in my formula

    so it cant cant be transformed into a vector formula
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  4. #4
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    Quote Originally Posted by transgalactic View Post
    i know parametric representation
    there is no vector in my formula

    so it cant cant be transformed into a vector formula
    Do you understand what a "vector formula" is? If you know that x= f(t) and y= g(t) then \vec{r}(t)= f(t)\vec{i}+ g(t)\vec{j} is a vector equation for the curve/
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  5. #5
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    yes but my original formula is not vectoric

    we cant make it a vectoric
    if its not defined as one from the begining
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