cos()

cos() takes a single argument in radians and returns a value in type double . The value returned by cos() is always in the range: -1 to 1. It is defined in <math.h> header file.

Sample Program:

/*

Write a program to illustrate cos math function of C.

*/

#include<stdio.h> 

#include<math.h> 

main() { 

 double result, x = .25; 

 result = cos(x); 

 printf("The cos(%lf) = %lf\n", x, result); 

 getch(); 

 return 0; 

}