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cos.0
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1996-09-02
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COS(3) UNIX 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)
_f_l_o_a_t
ccoossff(_f_l_o_a_t _x)
DDEESSCCRRIIPPTTIIOONN
The ccooss() and ccoossff() functions compute the cosine of _x (measured in radi-
ans). A large magnitude argument may yield a result with little or no
significance. 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 ccooss() function conforms to ANSI C3.159-1989 (``ANSI C'').
BSD Experimental May 2, 1991 1