MachFromAreaRatio:

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   Computes the Mach number from area ratio. The throat is at Mach 1.

   Type MachFromAreaRatio for a demo.

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   Form:
   M = MachFromAreaRatio( aR, gamma )
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   ------
   Inputs
   ------
   aR            (1,1)   Area ratio Exit Area/Throat Area
   gamma         (1,1)   Ratio of specific heats

   -------
   Outputs
   -------
   M             (1,1)   Mach number

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Children:

Common: Math/Secant
Propulsion: Chemical/AreaRatioFromMach