# 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) [from 2020-02-14]

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

## LICENSE

Artistic 2.0. See that license here.

## 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 of the same name. Without the authors and maintainers of *that* module, this module wouldn't exist in this form."