User talk:185.174.128.231

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October 2022
Hello, I'm SHB2000. I noticed that you added or changed content in an article, History of trigonometry‎, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at referencing for beginners. If you think I made a mistake, you can leave me a message on my talk page. Thank you. SHB2000 (talk) 07:27, 7 October 2022 (UTC)

Please do not add or significantly change content without citing verifiable and reliable sources. Before making any potentially controversial edits, it is recommended that you discuss them first on the article's talk page. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Adakiko (talk) 09:29, 7 October 2022 (UTC)