use warnings; use strict; my $ref_trig = make_trigtable(); print "\nangle sine cosine\n"; foreach (1..15) { my $angle = sprintf "%.1f", rand(3600)/10; printf "%5.1f %8.5f %8.5f\n", $angle, $ref_trig->{$angle}[0], $ref_trig->{$angle}[0]; } sub make_trigtable { use constant PI => 4 * atan2(1, 1); use constant DEG_TO_RAD => PI / 180; my %trig; foreach (0..3600) { my $angle = sprintf "%.1f", $_/10; $trig{$angle}=[sin $angle * DEG_TO_RAD, cos $angle * DEG_TO_RAD]; } return \%trig; } __END__ C:\perlmonks>perl sinhash.pl angle sine cosine 216.2 -0.59061 -0.59061 268.6 -0.99970 -0.99970 166.8 0.22835 0.22835 276.8 -0.99297 -0.99297 81.6 0.98927 0.98927 355.4 -0.08020 -0.08020 11.9 0.20620 0.20620 82.3 0.99098 0.99098 70.1 0.94029 0.94029 173.1 0.12014 0.12014 14.5 0.25038 0.25038 251.3 -0.94721 -0.94721 161.6 0.31565 0.31565 117.7 0.88539 0.88539 319.7 -0.64679 -0.64679