01  #include <stdio.h>
02  #include <math.h>
03  
04  int main()
05  {
06    double result, x = 0.5;
07  
08    result = sin(x);
09    printf("The sin() of %lf is %lfn", x, result);
10     
11    return 0;
12    
13  } 

 OUTPUT :
 
 The sin() of 0.500000 is 0.479426