Evaluate value of sine(x) in C

evaluate-sinex.c

#include <stdio.h>
#include <math.h>
float sine(int deg);
int fact(int n);

int main()
{
int x = 90;

printf(" %f ",sine(x));

return 0;
}

float sine(int deg)
{
    float x = (float) deg * (3.1416/180);

    int n, lim = 35;
    float possum = 0;
    for(n = 1; n<lim; n= n+4)
    {
     possum = possum + pow(x,n)/fact(n);
    }

    float negsum = 0;
    for(n = 3; n<lim; n= n+4)
    {
     negsum = negsum - pow(x,n)/fact(n);
    }

    float result = possum+ negsum;
    return result;

}

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