Formula for a sine wave the passes through three known points.

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  • eflaig
    New Member
    • Mar 2015
    • 1
    #1

    Formula for a sine wave the passes through three known points.

    Hi,

    I am trying to find the formula for a sine curve that passes through three known points with the lowest amplitude. Would anyone be able to provide some guidance regarding the best method of figuring this out?

    Thanks in advance.
    Tags: None
    • Zacariaz
      New Member
      • Jun 2015
      • 9
      #2
      Maybe this is what you're looking for?
      Fitting a sine wave of known frequency through three points
      http://math.stackexchange.com/questions/118526/fitting-a-sine-wave-of-known-frequency-through-three-points
      We have a computationally expensive function of a large set of data and an angle, that is known to result in a sine wave: $$ f(\text{data}, \theta) \approx a \sin (\theta + b) + c$$ We want to fi...


      Also AFAIK only one amplitude is applicable for a given set of 3 points. I may be wrong though.

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