TAN()
 To return the TANGENT of a degree.
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 Syntax

      TAN( <nDegree> ) -> nTan

 Arguments

      <nDegree> is a numeric value representing a degree value.

 Returns

      TAN() returns the tangent value of <nDegree>.

 Description

      TAN() is a trigonometrical function that returns the tangent value of
      a degree.

      For radians, see TANR().

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

 Examples

      ? Str( TAN(45), 11,  9)  // returns 1.000000000
      ? Str( TAN(60), 11,  9)  // returns 1.732050808

 Files: CALC.LIB

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