by Dinesh Thakur

 

#include<stdio.h>

#include<conio.h>
#include<math.h>
#define ACC 0.0001
#define PI 3.14
void main()
{
         int x,i;
         float x1,x2,cosz=0,term;
         clrscr();
         printf("Enter the X value:");
         scanf("%d",&x);
         x1=(x*PI)/180;
         // printf("%f",cos(x1));
        x2=x1*x1;
        term=1;
        cosz=term;
        for(i=2;fabs(term)>ACC;i=i+2)
            {
                 term = (x2*(-term))/(i*(i-1));
                 cosz = cosz+term;
            }
                 printf("\nNew Value : %f",cosz);
                 getch();
}
Output :
Enter the X value : 10
New Value : 0.984823




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