﻿ Example of C Program/Code to Find the sum of cos(x) series - EngineersGarage
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Find the sum of cos(x) series

`/* Write a C program to find the sum of cos(x) series */#include<stdio.h>#include<math.h>void main(){   	int n,x1,i,j;   	float x,sign,cosx,fact;   	printf("Enter the number of the terms in aseries\n");   	scanf("%d",&n);	printf("Enter the value of x(in degrees)\n");	scanf("%f",&x);	x1=x;	x=x*(3.142/180.0); /* Degrees to radians*/	cosx=1;	sign=-1;	for(i=2;i<=n;i=i+2)   	{		 fact=1;		 for(j=1;j<=i;j++)		 {			fact=fact*j;        	 }		 cosx=cosx+(pow(x,i)/fact)*sign;      		 sign=sign*(-1);	 }	 printf("Sum of the cosine series                    = %7.2f\n",cosx);	 printf("The value of cos(%d) using library function = %f\n",x1,cos(x));} 	/*End of main() *//*--------------------------------------------------------OutputEnter the number of the terms in aseries5Enter the value of x(in degrees)60Sum of the cosine series                    =    0.50The value of cos(60) using library function = 0.499882--------------------------------------------------------*/`