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al_fixtan(3)		   Library Functions Manual		  al_fixtan(3)

NAME
       al_fixtan - Allegro 5 API

SYNOPSIS
	      #include <allegro5/allegro.h>

	      al_fixed al_fixtan(al_fixed x);

DESCRIPTION
       This  function  finds the tangent of a value using a lookup table.  The
       input value must	be a fixed point binary	angle.

       Example:

	      al_fixed angle, res_a, res_b;
	      float dif;

	      angle = al_itofix(37);
	      /* Prove that tan(angle) == sin(angle) / cos(angle). */
	      res_a = al_fixdiv(al_fixsin(angle), al_fixcos(angle));
	      res_b = al_fixtan(angle);
	      dif = al_fixtof(al_fixsub(res_a, res_b));
	      printf("Precision	error: %f\n", dif);

RETURN VALUE
       Returns the tangent of a	fixed point binary format  angle  as  a	 fixed
       point value.

Allegro	reference manual					  al_fixtan(3)

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