sin()

The sin() function returns the sine of an angle argument, given in radians, in the range [-1,1].

sin(angle)

The angle parameter is expressed in radians.

The following example illustrates the sin() function:

#include<iostream>
#include<math.h>

using namespace std;

int main() {
  // convert degrees to radians
  double pi = M_PI;
  double degree = 60;
  double radian = degree * pi/180;

  cout << "Sine of 60 degrees is " << sin(radian) << "\n";

  return 0;
}

This results in the following output:

Sine of 60 degrees is 0.866025