User talk:219.90.108.216

February 2019
Hello, I'm LakesideMiners. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to List of trigonometric identities— because it 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 Help Desk. Thanks.  LakesideMiners My Talk Page 14:43, 7 February 2019 (UTC)
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