Arctan(x) Calculator — inverse tangent function

How to use the arctan(x) calculator
1. Enter any real number \(x\) and choose the number of decimal places.
2. Press calculate arctan(x). The answer is displayed in radians and degrees.

Formulas used:
\[ \text{arctan}(x) = y, \quad \tan(y) = x,\quad y \in (-\pi/2,\pi/2) \]
\[ \text{degrees} = \text{radians} \times \frac{180}{\pi} \]

• Domain: all real numbers (\(-\infty < x < \infty\))
• Range: \(-\pi/2 < \text{arctan}(x) < \pi/2\) radians   ( \(-90^\circ\) to \(90^\circ\) )

Example: \(\arctan(1) = \pi/4 \approx 0.785\) rad ( \(45^\circ\) ), \(\arctan(0) = 0\) rad ( \(0^\circ\) )