011_seno.c

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#include <stdio.h>
 
#define PI2 2*3.1415926535897932
 
int main(int argc, char *argv[])
{
    float x, sx, fct;
    int n, i;
    printf("Ingrese el valor de x: ");
    scanf("%f", &x);
    x-=((int)(x/(PI2)))*PI2;
    do{
        printf("Ingrese el numero de terminos: ");
        scanf("%d", &n);
    }while(n<1);
    for(i=0, sx=0, fct=x; i<n; i++)
    {
        sx += (1-2*(i%2))*fct;
        fct *= (x/(2*i+2))*(x/(2*i+3));
    }
    printf("sin(%f) = %f\n", x, sx);
    return 0;
}