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Thread: arcsin function

  1. Aug 22nd, 2001, 02:44 PM #1
    leif
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    arcsin function

    How do I do the formula

    B= 180-arcsin((Ri-Cl/Re)
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  2. Aug 22nd, 2001, 03:02 PM #2
    [Digital-X-Treme]
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    Smile Info.

    Try this...
    B = 180 - arcsin((Ri-Cl/Re)

    Derived math function for Arcsin...
    Arcsin(X) = Atn(X / Sqr(-X * X + 1))

    Substituting for x, we get.
    B = 180 - Atn((Ri-Cl/Re) / Sqr(-(Ri-Cl/Re) * (Ri-Cl/Re) + 1))
    Hope this helps

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    [VBCODE]Debug.Print Round(((1097) - ((55 ^ 5 + 311 ^ 3 - 11 ^ 3) _
    / (68 ^ 5))) ^ (1 / 7), 13)[/VBCODE]
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  3. Aug 22nd, 2001, 03:05 PM #3
    Dim A
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    Code:
    Public Function arcSin(x As Double) As Double
    arcSin = Atn(x / Sqr(-x * x + 1))
End Function
    Try something like this, but don't forget to test for acceptable values. All the degree measures are in radians.

    - Dim A
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