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

 
 OUTPUT :
 
 The tan of 0.500000 is 0.546302