math cos
The C++ cos() function returns the cosine of an angle given in radian. It is defined in
<cmath>header file.
Syntax
cos(x)
Parameters
The cos() function takes a one argument in radians.
Return value
The cos() function returns the value in the range of [-1, 1].Return value Cosine of x radians.That value is either in double, float, or long double.
cos degrees
cos() prototype [As of C++ 11 standard]
double cos(double x); float cos(float x); long double cos(long double x); double cos(T x); // additional overloads for integral types
cosine pi
Example 1: C++ cos()
#include <stdio.h> #include <math.h> #define PI 3.14159265 int main () { double param, result; param = 11.0; result = cos ( param * PI / 180.0 ); printf ("The cosine of %f degrees is %f.\n", param, result ); return 0; }
Output
The cosine of 11.000000 degrees is 0.981627.
cos function
Example 2 : With the Negative Value
#include <stdio.h> #include <math.h> #define PI 3.14159265 int main () { double param, result; // let take negative value param = -22.0; result = cos ( param * PI / 180.0 ); printf ("The cosine of %f degrees is %f.\n", param, result ); return 0; }
Output
The cosine of -22.000000 degrees is 0.927184.
When the value is negative but it remains the same as
cos(-x) = cos(x)
cosine c
Example 3 : C++ code with integral type
#include <iostream> #include <cmath> using namespace std; int main() { int x = 4; double result; // result is in double result = cos(x); cout << "cos(x) = " << result << endl; return 0; }
Output
cos(x) = -0.653644