- From: Oriol Brufau via GitHub <sysbot+gh@w3.org>
- Date: Fri, 12 Jul 2019 17:28:24 +0000
- To: public-css-archive@w3.org
> I would argue strongly for a solution that supports round-tripping, so that atan(tan(90deg)) returns 90deg IMO `atan(tan(90deg)) = 90deg` should just be a consequence, not what we want to enforce. Note that `atan ∘ tan` is not the identity, e.g. `atan(tan(2π))` is not `2π` (given the usual definition of `atan`). The identity is `tan ∘ atan`, so if we want to preserve this in CSS, what we actually need is `tan(atan(+∞)) = +∞`. And since `atan(+∞) = 90deg`, then `tan(90deg) = +∞` -- GitHub Notification of comment by Loirooriol Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/4101#issuecomment-510968263 using your GitHub account
Received on Friday, 12 July 2019 17:28:25 UTC