


      TAN(3F)                     (UNIX 5.0)                    TAN(3F)



      NAME
           tan, dtan - Fortran tangent intrinsic function

      SYNTAX
           real r1, r2
           double precision dp1, dp2

           r2 = tan(r1)

           dp2 = dtan(dp1)
           dp2 = tan(dp1)

      DESCRIPTION
           Tan returns the tangent of its argument, in the type of its
           argument.

           Dtan returns the double-precision tangent of its double-
           precision argument.

           Tan works with real or double-precision arguments, but Dtan
           is for programming clarity.

      SEE ALSO
           trig(3M).































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