


      TANH(3F)                    (UNIX 5.0)                   TANH(3F)



      NAME
           tanh, dtanh - Fortran hyperbolic tangent intrinsic function

      SYNTAX
           real r1, r2
           double precision dp1, dp2

           r2 = tanh(r1)

           dp2 = dtanh(dp1)
           dp2 = tanh(dp1)

      DESCRIPTION
           Tanh returns the hyperbolic tangent of its argument, in the
           type of its argument.

           Dtanh returns the double-precision hyperbolic tangent of its
           double precision argument.

           Tanh works with real or double-precision arguments, but
           dtanh is for programming clarity.

      SEE ALSO
           sinh(3M).































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