ASINR()
 To return the ARCSINE in radians of a sine value.
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 Syntax

      ASINR( <nSin> ) -> nRadian

 Arguments

      <nSin> is a numeric value representing a sine value.

      NOTE: Since a parameter of greater than 1 result in a math overflow,
            this function returns 0 as a result instead of a math overflow.

 Returns

      ASINR() returns the arcsine value (reverse sine) in radians of <nSin>.

 Description

      ASINR() is a trigonometrical function that returns the arcsine value
      in radians of a sine value.

      For degrees, see ASIN().

      Accuracy is to the twelfth decimal (i.e. .00000000001)

 Examples

      ? Str( ASINR(.707106781), 8,  6)  // returns 0.785398
      ? Str( ASINR(.866025403), 8,  6)  // returns 1.047198

 Files: CALC.LIB

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