Acceptance Criteria

• The listed features are documented sufficiently on MDN
• BCD is updated
• Interactive example and data repos are updated if appropriate
• The content has been reviewed as needed

For folks helping with Firefox related documentation

• Set bugs to dev-doc-complete
• Add entry to Firefox release notes if feature is enabled in release
  or
• Add entry to Firefox experimental features page if feature is not yet enabled in release

Features to document

Implement trigonometric functions and constants https://drafts.csswg.org/css-values-4/#trig-funcs

Related Gecko bugs

https://bugzilla.mozilla.org/show_bug.cgi?id=1774589

Issues and PRs

• Compat data: feat(css): Update Firefox support for CSS trigonometric functions browser-compat-data#17505
• MDN/content
• Exp. feat. table: flags(CSS): add details about trig functions flag #20654
• Constants <calc-constant> - New CSS data type #20856
• Relnote: relnote(105): Add details of CSS trig functions and constants #21844