SIN
Section: Mathematical Library (3M)
Index
Return to Main Contents
NAME
sin, cos, tan, asin, acos, atan, atan2 - trigonometric functions
SYNOPSIS
#include <math.h>
double sin(x)
double x;
double cos(x)
double x;
double asin(x)
double x;
double acos(x)
double x;
double atan(x)
double x;
double atan2(x, y)
double x, y;
DESCRIPTION
Sin, cos
and
tan
return trigonometric functions of radian arguments.
The magnitude of the argument should be checked
by the caller to make sure the result is meaningful.
Asin
returns the arc sin in the range -pi/2 to pi/2.
Acos
returns the arc cosine in the range
0 to pi.
Atan
returns the arc tangent of
x
in the range -pi/2 to pi/2.
Atan2
returns the arc tangent of
x/y
in the range -pi to pi.
DIAGNOSTICS
Arguments of magnitude greater than 1
cause
asin
and
acos
to return value 0;
errno
is set to EDOM.
The value of
tan
at its singular points is a huge number, and
errno
is set to ERANGE.
BUGS
The value of
tan
for arguments greater than about 2**31 is garbage.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- DIAGNOSTICS
-
- BUGS
-
This document was created by
man2html,
using the manual pages.
Time: 10:17:14 GMT, December 28, 2024