07-22-2011
Quote:
Originally Posted by
Pelle-48
Is this kind of trig faster than using a table?
A table would have fantastic speed but very poor accuracy; the lilbrary routines are built for maximum accuracy on the assumption they may be put to scientific or mathematical use.
If you'd posted what your error message was in the first place we could have solved your problem in one post instead of two pages.
Last edited by Corona688; 07-22-2011 at 03:14 PM..
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LEARN ABOUT CENTOS
sincosf
SINCOS(3) Linux Programmer's Manual SINCOS(3)
NAME
sincos, sincosf, sincosl - calculate sin and cos simultaneously
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <math.h>
void sincos(double x, double *sin, double *cos);
void sincosf(float x, float *sin, float *cos);
void sincosl(long double x, long double *sin, long double *cos);
Link with -lm.
DESCRIPTION
Several applications need sine and cosine of the same angle x. This function computes both at the same time, and stores the results in
*sin and *cos.
If x is a NaN, a NaN is returned in *sin and *cos.
If x is positive infinity or negative infinity, a domain error occurs, and a NaN is returned in *sin and *cos.
RETURN VALUE
These functions return void.
ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.
The following errors can occur:
Domain error: x is an infinity
An invalid floating-point exception (FE_INVALID) is raised.
These functions do not set errno.
VERSIONS
These functions first appeared in glibc in version 2.1.
CONFORMING TO
This function is a GNU extension.
SEE ALSO
cos(3), sin(3), tan(3)
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU
2008-08-11 SINCOS(3)