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.TH "al_fixcos" "3alleg5" "" "Allegro reference manual" ""
.hy
.SH NAME
.PP
al_fixcos - Allegro 5 API
.SH SYNOPSIS
.IP
.nf
\f[C]
#include <allegro5/allegro.h>

al_fixed al_fixcos(al_fixed x);
\f[R]
.fi
.SH DESCRIPTION
.PP
This function finds the cosine of a value using a lookup table.
The input value must be a fixed point binary angle.
.PP
Example:
.IP
.nf
\f[C]
al_fixed angle;
float result;

/* Set the binary angle to 45 degrees. */
angle = al_itofix(32);

/* The cosine of 45 degrees is about 0.7071. */
result = al_fixtof(al_fixcos(angle));
assert(result > 0.7 && result < 0.71);
\f[R]
.fi
.SH RETURN VALUE
.PP
Returns the cosine of a fixed point binary format angle as a fixed point
value.