C++ sin() Function Usage and Example

C++ Library Function <cmath>

C ++returns the sine value of the angle (parameter) represented in radians.

This function is in<cmath>header file definition.

[Mathematics] sin x = sin(x) [C++]

sin() prototype (from C ++ 11standard beginning)

double sin(double x);
float sin(float x);
long double sin(long double x);
double sin(T x);　//is of integer type

sin() parameter

sin() function takes a mandatory parameter in radians.

sin() return value

sin() function returns[-1,1]range of values. The returned value is double, float, or long double.

Example1：How sin() works in C ++What is working in the middle?

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
　　double x = 0.439203, result;
　　
　　result = sin(x);
　　cout << "sin(x) = " << result << endl;
　　
　　double xDegrees =　90.0;
　　
　　//Convert degrees to radians
　　x = xDegrees*3.14159/180;
　　result = sin(x);
　　
　　cout << "sin(x) = " << result << endl;
　　return 0;
}

The output when running the program is:

sin(x) = 0.425218
sin(x) =　1

Example2: The sin() function with integer type

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
　　int x =　-1;
　　double result;
　　result = sin(x);
　　cout << "sin(x) = " << result << endl;
　　
　　return 0;
}

The output when running the program is:

sin(x) =　-0.841471

　 C++ Library Function <cmath>