计算代数表达式C语言

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

int main () {
    double pi = 3.14159
    double x;
    scanf("%lf", &x);
    double y = sqrt((sin(pi / 3) + 1) * (sin(pi / 6) + 1) / cos(x / 180 * pi));
    printf("%d", y);
}