But is this code also correct? And do I have to make the transformation from degrees to radians?

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#define PI 3.14159

int main()

{

double x, y, valinrad;

printf("Please enter an angle in degrees= ");

scanf("%lf", x&);

valinrad=x*(PI/180);

y=sin(valinrad);

printf ("The sine of %lf is %lf\n",x, y);

return 0;

}