User talk:2405:204:738B:2734:DC88:2E6E:C1D4:470

July 2019
Hello, I'm Zachary Schr. I wanted to let you know that one or more of your recent contributions 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 help desk. Thanks. FiberTech (talk) 14:23, 10 July 2019 (UTC)
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