C library function - sin()


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Description

The C library function double sin(double x) returns the sine of a radian angle x.

Declaration

Following is the declaration for sin() function.

double sin(double x)

Parameters

  • x − This is the floating point value representing an angle expressed in radians.

Return Value

This function returns sine of x.

Example

The following example shows the usage of sin() function.

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

#define PI 3.14159265

int main () {
   double x, ret, val;

   x = 45.0;
   val = PI / 180;
   ret = sin(x*val);
   printf("The sine of %lf is %lf degrees", x, ret);
   
   return(0);
}

Let us compile and run the above program to produce the following result −

The sine of 45.000000 degrees is 0.707107
math_h.htm

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