Arcsec(x) Calculator

An online calculator to calculate inverse secant function arcsec(x) in radians and degrees. The graph of y = arcsec(x) is shown below and it has the horizontal asymptote \( y = \dfrac{\pi}{2} \) defined as \[ \lim_{x\to-\infty} arcsec(x) = \dfrac{\pi}{2} \quad \text{and} \quad \lim_{x\to+\infty} arcsec(x) = \dfrac{\pi}{2} \] The domain of \( y = arcsec(x) \) is given by: \[ -\infty \lt x \le -1 \quad \cup \quad 1 \le x \lt \infty \] The range of \( y = arcsec(x) \) is given by: \[ 0 \le y \lt \dfrac{\pi}{2} \quad \cup \quad \dfrac{\pi}{2} \lt y \le \pi \]
Graph of inverse secant arcsec(x)

How to use the arcsec (x) calculator

1 - Enter x as a real number and the number of decimal places desired then press "enter". Two answers; one in radians and the other in degrees are displayed. For any value of x outside the domain defined above "NaN"(not a number) is displayed.

x =
Decimal Places =
arcsec(x)= radians

arcsec(x) = degrees

You may use it to explore the domain and range of \( arcsec(x) \).

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