#include<stdio.h>
#include<math.h>
int main()
{
  double x;
  double a=5,b=8,s;
  x=sin(30.0*3.14159/180);
  printf("sin(30.0 )=%.3f\n",x);
  s=pow(a,b);
  printf("a^b=%lf\n",s);
  return 0;
}