### ----------------------------------------------------
### -- Math::Trig
### -- Licenses: Artistic-2.0
### -- Authors: Tom Browder <tbrowder@acm.org> [since 2020-02-14], Jonathan Scott Duff <duff@pobox.com> [deceased]
### -- File: docs/README.pod
### ----------------------------------------------------
=begin pod

=head1 Math::Trig

Provides subroutines for coverting between degrees, radians, and gradians;
converting between different coordinate systems (cartesian, spherical,
cylindrical); and great circle formulas.

Also provides versions of the common trigonemetric functions that take
or return their arguments in degrees:

=begin code
sind
cosd
tand
asind
acosd
atand
atan2d
=end code

There are also some useful constants defined:

=begin code
pi2 = pi/2;
pi4 = pi/4;
_2pi = pi*2;
_4pi = pi*4;
=end code

=head2 SYNOPSIS

=begin code
use Math::Trig;      # no trigonometric functions exported
use Math::Trig :ALL; # includes the trig functions
=end code


=head2 INSTALLATION

=begin code
zef install Math::Trig
=end code

=head2 BUGS

=item This is a work in progress.  Caveat emptor.

=head2 AUTHORS

=item Tom Browder (tbrowder@cpan.org) [from 2020-02-14]

=item Original author: the late Jonathan Scott Duff <@perlpilot>, RIP

=head2 LICENSE

Artistic 2.0. See that license [here](./LICENSE).

=head2 COPYRIGHT

Copyright E<0x00a9> 2019-2022 by Tom Browder.

Copyright E<0x00a9> 2015 by Jonathan Scott Duff.

=head2 ACKNOWLEDGEMENTS

Jonathan Duff's words: "This module is shamelessly based on the
[Perl 5 module](https://metacpan.org/pod/Math::Trig) of the same name.
Without the authors and maintainers of *that* module, this module
wouldn't exist in this form."

=end pod


