User talk:2409:4053:2E95:1377:FCA6:D210:8FD7:4046

October 2021
Hello, I'm DVdm. I wanted to let you know that one or more of your recent contributions&#32;to List of trigonometric identities have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Teahouse.   DVdm (talk) 09:15, 10 October 2021 (UTC)