### 3. Library calls (functions within program libraries)

# SINCOS

Section: Linux Programmer's Manual (3)Updated: 2015-03-02

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## NAME

sincos, sincosf, sincosl - calculate sin and cos simultaneously## SYNOPSIS

#define _GNU_SOURCE/* See feature_test_macros(7) */#include <math.h>void sincos(doublex, double *sin, double *cos);

void sincosf(floatx, float *sin, float *cos);

void sincosl(long doublex, long double *sin, long double *cos);

## DESCRIPTION

Several applications need sine and cosine of the same angle*x*. These functions compute both at the same time, and store 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.## ATTRIBUTES

For an explanation of the terms used in this section, see**attributes**(7).

Interface | Attribute | Value |

sincos(),
sincosf(),
sincosl()
| Thread safety | MT-Safe |

## CONFORMING TO

These functions are GNU extensions.## SEE ALSO

**cos**(3),

**sin**(3),

**tan**(3)

## COLOPHON

This page is part of release 4.04 of the Linux*man-pages*project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.

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