By | 05.11.2016

# Sine Series using Functions Sin(x)

Write a C Program to find Sine Series using Functions Sin(x). Here’s simple C Program to find Sine Series using Functions Sin(x) in C Programming Language.

## Numbers in C

Normally, when we work with Numbers, we use primitive data types such as int, short, long, float and double, etc. The number data types, their possible values and number ranges have been explained while discussing C Data Types.

Here is source code of the C Program to find Sine Series using Functions Sin(x). The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.

### SOURCE CODE : :

```/*  C Program to find Sine Series using Functions Sin(x)  */

#include<stdio.h>
#include<math.h>

int factorial(int n)
{
int i,fact=1;
for(i=1;i<=n;i++)
fact=fact*i;
return fact;
}

int main()
{
double x, sinx=0, z, term;
int j, n, i,sign=-1;

printf("\nEnter the value for x : ") ;  //Example 45 180 90 360
scanf("%lf", &x) ;
printf("\nEnter the value for n : ") ;   //Example 10 20
scanf("%d", &n) ;

x = x * 3.14159 / 180 ;   //converting degree to radian
i=0;
z=sin(x);

for(i=1;i<=n;i=i+2)
{
sign=-sign;
term=sign*pow(x,i)/factorial(i);
sinx=sinx+term;
}

printf("\nsin(x) is approximately %.15lf\n", sinx);
printf("\nsin(x) by default function is %.15lf\n", z);

return 0;
}```

### OUTPUT : :

```/*  C Program to find Sine Series using Functions Sin(x)  */

Enter the value for x : 120

Enter the value for n : 10

sin(x) is approximately 0.866109150524903

sin(x) by default function is 0.866026288313015

Process returned 0```

Above is the source code for C Program to find Sin Series using Functions Sin(x) which is successfully compiled and run on Windows System.The Output of the program is shown above .

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