ex_tan.nxc

This is an example of how to use the tan function.

// ex_tan.nxc
// Display values generated by the tan API call.
// This program runs indefinitely -- press gray button to exit.
// Reguires enhanced firmware 1.28 or later.

#define DELTA PI / 8

// Angles from -3/8 PI radians to almost P1/2 radians stepped by PI/8 radians.
const float data[] =
{
   -3 * DELTA,
   -2 * DELTA,
   -DELTA,
   0.0,
   DELTA,
   2 * DELTA,
   3 * DELTA,
   4 * DELTA - 0.01
};

// Display a table of angles and their tangents. The angles are the ones 
// specified above.
task main()
{
   const int items = ArrayLen(data);
   for (int i = 0; i < items; ++i)
   {
      int screen_y = 56 - 8 * i;
      float angle = data[i];
      TextOut(0, screen_y, FormatNum("%7.4f", angle));
      TextOut(45, screen_y, FormatNum("%8.4f", tan(angle)));
   }
   while (true);
}