HELPLIB.HLB  —  CRTL  atanh
    Returns the hyperbolic arc tangent of its argument.

    This function is OpenVMS Alpha and Integrity servers only.

    Format

      #include  <math.h>

      double atanh  (double x);

      float atanhf  (float x);

      long double atanhl  (long double x);
Additional Information: explode extract
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