HP-UX Reference (11i v1 00/12) - 3 Library Functions A-M (vol 6)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man3/!!!intro.3c
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c
cosd(3M) cosd(3M)
NAME
cosd(), cosdf() - degree-valued cosine functions
SYNOPSIS
#include <math.h>
double cosd(double x);
float cosdf(float x);
DESCRIPTION
The cosd() function is a degree-valued version of cos(). It returns the cosine of x (x specified in
degrees).
The cosd() function may lose accuracy when x is far from zero.
The cosdf() function is a float version of cosd(); it takes a float argument and returns a float
result.
The cosd() and cosdf() functions are not specified by any standard, but cosdf() is named in accor-
dance with the conventions specified in the "Future Library Directions" section of the ANSI C standard.
To use these functions, compile either with the default
-Ae option or with the -Aa and
-D_HPUX_SOURCE options. Make sure your program includes <
math.h>. Link in the math library by
specifying
-lm on the compiler or linker command line.
RETURN VALUE
If x is NaN or ±INFINITY, cosd() returns NaN.
If the correct value after rounding would be smaller in magnitude than
MINDOUBLE, cosd() returns
zero.
ERRORS
No errors are defined.
SEE ALSO
acosd(3M), asind(3M), atan2d(3M), atand(3M), cos(3M), sind(3M), tand(3M), math(5), values(5).
Section 3−−86 − 1 − HP-UX Release 11i: December 2000
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