trigonometry - How do I convert an Arctangent into degrees by hand? - Mathematics Stack Exchange
Solution 34422: Calculating Inverse Sine (Arcsine), Cosine (Arccosine), and Tangent (Arctangent) Using the TI-84 Plus C Silver Edition Graphing Calculator.
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arctan using a calculator - YouTube
Intro to arctangent (video) | Trigonometry | Khan Academy
Online arctangent calculator (arctan) - With exercises and more!
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Arctan Calculator 📐 - calculates arctan(x) of a number
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Online arctangent calculator (arctan) - With exercises and more!