C Programming

C program to find sum of cosine series?

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Wiki User
December 02, 2008 6:12AM

#include<stdio.h>

#include<math.h>

void main()

{

float pow = 2.0, nr, dr = 1.0, x1, sum;

int i = 1,n,s = -1,x;

clrscr();

printf("\n\n\t ENTER THE ANGLE...: ");

scanf("%d", &x);

x1 = 3.142 * (x / 180.0);

sum = 1.0;

nr = x1*x1;

printf("\n\t ENTER THE NUMBER OF TERMS...: ");

scanf("%d",&n);

while(i<=n)

{

dr = dr * pow * (pow - 1.0);

sum = sum + (nr / (dr * s));

s = s * (-1);

pow = pow + 2.0;

nr = nr * x1 * x1;

i++;

}

printf("\n\t THE SUM OF THE COS SERIES IS..: %0.3f", sum);

getch();

}


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