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  1. Inverse trigonometric functions - Wikipedia

  2. Arctan - Formula, Graph, Identities, Domain and Range | Arctan x

  3. arctan (x) - Wolfram|Alpha

  4. Arctan - Formula, Graph, Identities, Domain, Range & FAQs

  5. Arctan - Math.net

  6. Arctan Calculator to calculate arctan(x)

  7. Arctan Calculator

  8. 19.1: The functions of arcsin, arccos, and arctan

  9. The trigonometry arctan() function - inverse tangent - math word ...

  10. Inverse Tangent -- from Wolfram MathWorld