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

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

NNAAMMEE
     ccooss - cosine function

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

     _d_o_u_b_l_e
     ccooss(_d_o_u_b_l_e _x);

DDEESSCCRRIIPPTTIIOONN
     The ccooss() 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).

RREETTUURRNN VVAALLUUEESS
     The ccooss() function returns the cosine value.

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

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

4.4BSD                           June 4, 1993                                1