txt: ## dist_zef-tbrowder-Math-Trig.md
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  # 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:
  
  ```
  sind
  cosd
  tand
  asind
  acosd
  atand
  atan2d
  
  ```
  
  There are also some useful constants defined:
  
  ```
  pi2 = pi/2;
  pi4 = pi/4;
  _2pi = pi*2;
  _4pi = pi*4;
  
  ```
  
  ## SYNOPSIS
  
  ```
  use Math::Trig;      # no trigonometric functions exported
  use Math::Trig :ALL; # includes the trig functions
  
  ```
  
  ## INSTALLATION
  
  ```
  zef install Math::Trig
  
  ```
  
  ## BUGS
  
  * This is a work in progress. Caveat emptor.
  
  ## AUTHORS
  
  * Tom Browder ([tbrowder@cpan.org](mailto:tbrowder@cpan.org)) [from 2020-02-14]
  * Original author: the late Jonathan Scott Duff <@perlpilot>, RIP
  
  ## LICENSE
  
  Artistic 2.0. See that license [here](./LICENSE).
  
  ## COPYRIGHT
  
  Copyright © 2019-2022 by Tom Browder.
  
  Copyright © 2015 by Jonathan Scott Duff.
  
  ## 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."
  