sin


function
<cmath> 
     double sin (      double x );
      float sin (       float x );
long double sin ( long double x );

Compute sine

Returns the sine of an angle of x radians.

In C++, this function is overloaded in <complex> and <valarray> (see complex sin and valarray sin).

Parameters

x
Floating point value representing an angle expressed in radians.


Return Value

Sine of x.

Portability

In C, only the double version of this function exists with this name.

Example

1
2
3
4
5
6
7
8
9
10
11
12
13
14
 
/* sin example */
#include <stdio.h>
#include <math.h>

#define PI 3.14159265

int main ()
{
  double param, result;
  param = 30.0;
  result = sin (param*PI/180);
  printf ("The sine of %lf degrees is %lf.\n", param, result );
  return 0;
}


Output:

The sine of 30.000000 degrees is 0.500000.


See also

cos Compute cosine (function)
tan Compute tangent (function)