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Differential Equations

  1. Jan 2, 2005 #1
    how can I calculate the "diameter" of a spiral ? someone told me i need to use Differential or Integral Equations to solve this, but i'm not sure how.

    If there is a spiral that it's radius increases by 1 cm for every radian until the radius reaches the size R . how can I calculate the length of the line that the spiral consists of?
  2. jcsd
  3. Jan 2, 2005 #2


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    try parametrizing it by angle.
  4. Jan 2, 2005 #3


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    That's the Spiral of Archimedes.For details check this wonderful site (warning:it's in French):
    spiral of Archimedes

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