SIN(2)SIN(2)
NAME
sin, cos, tan, asin, acos, atan, atan2 – trigonometric functions
SYNOPSIS
#include <u.h>
#include <libc.h>
double sin(double x)
double cos(double x)
double tan(double x)
double asin(double x)
double acos(double x)
double atan(double x)
double atan2(double y, double x)
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 sine in the range
–π/2 to π/2.
Acos
returns the arc cosine in the range
0 to π.
Atan
returns the arc tangent in the range
–π/2 to π/2.
Atan2
returns the arc tangent of
y/x
in the range
–π to π.
SOURCE
/sys/src/libc/port
SEE
intro(2)
BUGS
The value of
tan
for arguments greater than about
2\s-231\s+2
is garbage.