sin() — Calculate Sine

Format

#include <math.h>
double sin(double x);

Language Level: ANSI

Threadsafe: Yes.

Description

The sin() function calculates the sine of x, with x expressed in radians. If x is too large, a partial loss of significance in the result may occur.

Return Value

The sin() function returns the value of the sine of x. The value of errno may be set to either EDOM or ERANGE.

Example that uses sin()

This example computes y as the sine of π/2.

#include <math.h>
#include <stdio.h>
 
int main(void)
{
   double pi, x, y;
 
   pi = 3.1415926535;
   x = pi/2;
   y = sin(x);
 
   printf("sin( %lf ) = %lf\n", x, y);
}
/*********************  Output should be similar to: *************
 
sin( 1.570796 ) = 1.000000
*/

Related Information

• acos() — Calculate Arccosine
• asin() — Calculate Arcsine
• atan() – atan2() — Calculate Arctangent
• cos() — Calculate Cosine
• cosh() — Calculate Hyperbolic Cosine
• sinh() — Calculate Hyperbolic Sine
• tan() — Calculate Tangent
• tanh() — Calculate Hyperbolic Tangent
• <math.h>