
COS(3)                     UNIX Programmer's Manual                     COS(3)

NNAAMMEE
     ccooss - cosine function

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<mmaatthh..hh>>

     _d_o_u_b_l_e
     ccooss(_d_o_u_b_l_e _x)

DDEESSCCRRIIPPTTIIOONN
     The ccooss() function computes the cosine of _x (measured in radians).  A
     large magnitude argument may yield a result with little or no signifi-
     cance.  For a discussion of error due to roundoff, see math(3).

RREETTUURRNN VVAALLUUEESS
     The ccooss() function returns the cosine value.

SSEEEE AALLSSOO
     sin(3),  tan(3),  asin(3),  acos(3),  atan(3),  atan2(3),  sinh(3),
     cosh(3),  tanh(3),  math(3),

SSTTAANNDDAARRDDSS
     The aaccooss() function conforms to ANSI C3.159-1989 (``ANSI C'').

BSD Experimental                  May 2, 1991                                1






































