Compute sin(x)/cos(x) using Taylor series approximation.Program and Algorithm Computer Science Engineering VTU

Taylor series 

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main()
{
 int ch,i;
 float num,den,x,degree,sum=0,term;
 printf("enter 1 for sin(x)\n enter 2 for cos(x)\n");
 scanf("%d",&ch);
 printf("enter the degree\n");
 scanf("%f",&degree);
 x=(degree*3.14)/180.0;
 switch(ch)
{
 	case 1:num=x;
 	den=1;
 	i=2;
	break;
 	case 2:num=1;
 	den=1;
 	i=1;
 	break;
 	default:printf("enter the proper choice\n");
 	exit(0);
}
 	do
{
 	term=num/den;
 	num=-num*x*x;
 	den=den*i*(i+1);
 	sum=sum+term;
 	i=i+2;
} 	while(fabs(term)>0.000001);
 	if(ch==1)
{
 	printf("sin(%f)without using built in function=%f\n",degree,sum);
 	printf("sin(%f)with using built in function=%f\n",degree,sin(x));
}
	else
{ 
	printf("cos(%f) without using built in function=%f\n",degree,sum);
	printf("cos(%f)with using built in function=%f\n",degree,cos(x));
}
	return 0;
}

Taylorseriesalg

Start
Read degree
x=degree*pi /180
Read choice 1: sin, 2: cos
If choice is 1: num = x, den = 1, i = 2
If choice is 2: num = 1, den = 1, i = 1
Do
term = num/den
sum = sum + term
i = i+2
num = -num * x * x
den = den * i * (i+1)
while(fabs(term) > 0.00001)
If choice is 1: print sum and sin(x)
If choice is 2: print sum and cos(x)
Stop