Print Cos series

                                              To compile and execute the program, copy the code into a text file. Save the text file with the extinction .c (ex. program.c). Save your file in turboc2 or borland (it may your othe c-compiler). Now open you IDE (tc.exe) , goto file->pick file. Your source file will be loaded into IDE. Now you can compile and run the file easily.

#include <math.h>
#include <stdio.h>
#include<conio.h>

const double PI = 3.14159265;

double MyCos(double x)
{
 double sqx = x * x;     
 double cosineresult = 1;
 double fact = 2;
 int index = 2;
 int term = 0;
 double termfactor = 0;

 for(term = 1; term < 20; term++)
 {
   termfactor = 0;
   termfactor = sqx / fact;
   if(term %2)
   {
     cosineresult = cosineresult - termfactor;
   }
   else
   {
     cosineresult = cosineresult + termfactor;
   }
   index++;
   fact *= index;
   index++;
   fact *= index;
   sqx *= (x*x);
 }
 return cosineresult;
}

int main()
{
 double i = 0;
 clrscr();
 gotoxy(31,1);
 printf("Sin Series");
 gotoxy(26,3);
 printf("www.techaravind.blogspot.com");
 gotoxy(1,5);
 for(i = 0; i <= 360; i += 4.75)
 {
   printf("%.4lf = %.4lf\t%.4lf\n", i, cos(i * PI / 180), MyCos(i * PI / 180));
     }
getch();

}