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.(adsbygoogle = window.adsbygoogle || []).push({});

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?

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# Differential Equations diameter of a spiral

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