Robust/src/ClassLibrary/Math.java

   1 public class Math {
   2         //public static final double PI=3.14159265358979323846;
   3
   4         public double fabs(double x) {
   5                 if (x < 0) {
   6                         return -x;
   7                 } else {
   8                         return x;
   9                 }
  10         }
  11
  12         public double sin(double rad) {
  13                 double app;
  14                 double diff;
  15                 int inc = 1;
  16                 double PI=3.14159265358979323846;
  17
  18                 while( rad > 2*PI ) rad -= 2*PI;
  19                 while( rad < -2*PI ) rad += 2*PI;
  20                 app = diff = rad;
  21                 diff = (diff * (-(rad*rad))) / ((2.0 * inc) * (2.0 * inc + 1.0));
  22                 app = app + diff;
  23                 inc++;
  24                 while( fabs(diff) >= 0.00001 ) {
  25                         diff = (diff * (-(rad*rad))) / ((2.0 * inc) * (2.0 * inc + 1.0));
  26                         app = app + diff;
  27                         inc++;
  28                 }
  29                 return app;
  30         }
  31
  32         public double cos(double rad) {
  33                 double app;
  34                 double diff;
  35                 int inc = 1;
  36                 double PI=3.14159265358979323846;
  37
  38                 rad += PI/2.0;
  39                 while( rad > 2*PI ) rad -= 2*PI;
  40                 while( rad < -2*PI ) rad += 2*PI;
  41                 app = diff = rad;
  42                 diff = (diff * (-(rad*rad))) / ((2.0 * inc) * (2.0 * inc + 1.0));
  43                 app = app + diff;
  44                 inc++;
  45                 while( fabs(diff) >= 0.00001 ) {
  46                         diff = (diff * (-(rad*rad))) / ((2.0 * inc) * (2.0 * inc + 1.0));
  47                         app = app + diff;
  48                         inc++;
  49                 }
  50                 return app;
  51         }
  52 }