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COS X SERIES
#include<stdio.h>
#include<math.h>
int main()
{
float x,sum,f=1.0;
int n,i,j=-1,k;
printf("Enter the number of term: ");
scanf("%d",&n);
printf("Enter the value of x*: ");
scanf("%f",&x);
x=(3.14/180)*x;
sum=1;
for(i=2,k=2;i<=n;i++,k+=2)
{
f=f*(k-1)*k;
sum=sum+(pow(x,k)/f)*j;
j=j*(-1);
}
printf("sum=> %.2f",sum);
return 1;
}
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