Question

WAP to calculate the value of series:sinx=x-x3 /3!+x5 /5!.....xn /n!

Answer 1

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

double factorial(int);
void   calc(float, float*);

int main()
{
    int   x;
    float radian, result = 0;

    printf("Enter value of x in degrees\n");
    scanf("%d", &x);

    radian = x * (3.14159 / 180.0); // Convert Degree To Radian

    calc(radian, &result);

    printf("Sin(%d) = %f\n", x, result);

    return 0;
}

void calc(float num, float *res)
{
    int count, n = 1, sign = 1;

    for(count = 1; (n <= 10); count += 2)
    {
       *res  +=  sign * ( pow(num, count) / factorial(count) );
        n    +=  1;
        sign *= -1;
    }
}

double factorial(int num)
{
    int    count;
    double sum = 1;

    for(count = 1; count <= num; count++)
    {
        sum *= count;
    }
    return(sum);
}

Output: