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  1. What are "tan" and "atan"? - Mathematics Stack Exchange

    May 4, 2015 · 0 atan stands for "arc tangent." It is the inverse function of tangent - this means it undoes the tangent function. So atan (tan (30)) = 30.

  2. Confusion about atan vs atan2 - Mathematics Stack Exchange

    Feb 29, 2024 · Here is a graph of atan(m) and the graph of acos(1/sqrt(1+m^2)) Both produce identical values for positive slope m, but the second one returns only the positive branch of …

  3. What is the Arctangent of Tangent? - Mathematics Stack Exchange

    simple solution... draw a graph of the tangent function. Then draw the arctan function on both an x-y graph and a y-x graph.

  4. How does atan (1) * 4 equal PI? - Mathematics Stack Exchange

    How does this give PI? On the second point, if I understand atan correctly, it takes a ratio of two sides, and returns the corresponding angle. That means that atan(1) is referring a situation …

  5. Relative condition number of $x \mapsto \operatorname {atan} (x ...

    Jun 9, 2022 · I'm trying to think through the sensitivity of atan2 to errors in its inputs and I've run into a disconnect that I don't quite understand. I know that you can compute the relative …

  6. Are $\operatorname {asin}$, $\operatorname {acos}$ and …

    Jun 8, 2020 · The calculator I have used since high school uses ASIN, ACOS, and ATAN: On the other hand, TI and Casio calculators appear to use the $\operatorname {trig}^ {-1}$ notation. …

  7. trigonometry - How can one understand the ATAN2 () function for ...

    Apr 3, 2018 · @Ahmed ATAN2 is just a version of ATAN that accepts the numerator and denominator separately so that it can select the correct quadrant for the angle.

  8. How to compare angles without function atan2?

    Feb 15, 2024 · The sign of the determinant indicates the orientation of the vectors, while the dot product gives a measure of their alignment. Here's how you can compare the angles using …

  9. trigonometry - Why is the inverse tangent function not equivalent …

    Jun 10, 2016 · The reason that it isn't true is that, regrettably, the notation is not consistent. For this reason, many people avoid using $\tan^ {-1}$ and use $\arctan$ instead, and so on for the …

  10. argument and atan/arctan - Mathematics Stack Exchange

    May 26, 2018 · argument and atan/arctan Ask Question Asked 7 years, 7 months ago Modified 7 years, 7 months ago