Inverse Trigonometric Functions Calculator (Degrees)

Find arcsin, arccos, and arctan of a value x in degrees and radians, with a unit circle.

Input

Enter a value x to compute arcsin, arccos, and arctan in degrees and radians.

Function to compute

Value x

arcsin and arccos take −1 to 1. arctan takes any real number.

arcsin x (inverse sine) (x = 0.5)

30 deg

arcsin x (inverse sine)

Domain −1 to 1, range −90 to 90 deg

Angle (degrees)

30 deg

Radians

0.52359878

arccos x (inverse cosine)

Domain −1 to 1, range 0 to 180 deg

Angle (degrees)

60 deg

Radians

1.04719755

arctan x (inverse tangent)

Domain all real numbers, range −90 to 90 deg

Angle (degrees)

26.56505118 deg

Radians

0.46364761

arcsin and arccos are defined only when x is between −1 and 1. Values shown are principal values.

arcsin and arccos are defined only when the input x is between minus one and one. Outside that range no angle exists.
arctan is defined for every real number and returns an angle greater than minus ninety degrees and less than ninety degrees.
Principal values are used: arcsin from minus ninety to ninety degrees, arccos from zero to one hundred eighty degrees, and arctan from minus ninety to ninety degrees.
Degrees and radians are converted using the relation that one hundred eighty degrees equals pi radians.

Tell us what you think of this calculator.