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sine function

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NAME

sin csin

INTERFACE

#include <math.h>

double sin ( double x ) long sinl ( long double x ) float sinf ( float x )

#include <complex.h> complex sin(complex x) double complex csin(double complex x) float complex csinf(float complex x) long double complex csinl(long double complex x)

DESCRIPTION

The sin functions compute the sine of x (measured in radians). The complex sine is define by

$\sin(x) = \frac{exp(i x)-exp(-i x)}{2 i}$

(1)

Example 1

#include <stdio.h>
#include <math.h>

int main(void)
{
  double x=0.5;
  double result = sin(x);
  printf("The sin() of %lf is %lf\n", x, result);
  return 0;
}

SPECIAL VALUES

sin ( ±0 ) returns ±0.
sin ( ±∞ ) returns a NaN and raises the invalid floating-point exception.

STANDARDS

The sin function conforms to ISO/IEC 9899:1999(E).

Compatibility

<table class="compat"> <tr><th></th><th>DOS</th><th>UNIX</th><th>Windows</th><th>ANSI C</th><th>C++</th></tr> <tr><td>sinl</td><td>•</td><td></td><td>•</td><td></td><td></td></tr> <tr><td>Real sin</td><td>•</td><td></td><td>•</td><td>•</td><td></td></tr> <tr><td>Complex sin</td><td>•</td><td></td><td>•</td><td></td><td>•</td></tr> <tr><td>Complex csin</td><td></td><td>•</td><td></td><td></td><td>•</td></tr> </table>

sin