4.4BSD/usr/share/man/cat3/tanh.0

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TANH(3)                     BSD Programmer's Manual                    TANH(3)

NNAAMMEE
     ttaannhh - hyperbolic tangent function

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<mmaatthh..hh>>

     _d_o_u_b_l_e
     ttaannhh(_d_o_u_b_l_e _x);

DDEESSCCRRIIPPTTIIOONN
     The ttaannhh() function computes the hyperbolic tangent of _x. For a discus-
     sion of error due to roundoff, see math(3).

RREETTUURRNN VVAALLUUEESS
     The ttaannhh() function returns the hyperbolic tangent value.

SSEEEE AALLSSOO
     acos(3),  asin(3),  atan(3),  atan2(3),  cos(3),  cosh(3),  sin(3),
     sinh(3),  tan(3),  math(3),

SSTTAANNDDAARRDDSS
     The ttaannhh() function conforms to ANSI C X3.159-1989 (``ANSI C '').

4.4BSD                           June 4, 1993                                1