|
|
HP-UX Reference Volume 4 of 5 > ccos(3M) |
|
NAMEcos(), cosf() — cosine functions DESCRIPTIONcos() returns the cosine of x (x specified in radians). cos() may lose accuracy when x is far from zero. cosf() is a float version of cos(); it takes a float argument and returns a float result. To use this function, compile either with the default -Ae option or with the -Aa and -D_HPUX_SOURCE options. cosf() is not specified by any standard, but it is named in accordance with the conventions specified in the "Future Library Directions" section of the ANSI C standard. To use these functions, make sure your program includes <math.h>, and link in the math library by specifying -lm on the compiler or linker command line. Millicode versions of the cos() and cosf() functions are available. Millicode versions of math library functions are usually faster than their counterparts in the standard library. To use these versions, compile your program with the +Olibcalls or the +Oaggressive optimization option. For special cases, the millicode versions return the same values as their standard library counterparts (see the RETURN VALUE section). For more information, see the HP-UX Floating-Point Guide. |
|