Inverse Tangent (Arctan) Calculator
Calculate the inverse tangent (arctan) of a value. Returns the angle whose tangent equals the input.
Angle Rad
0.78539816
Formule
## Inverse Tangent (Arctan) ### Definition **arctan(x) = the angle whose tangent is x** ### Domain and Range - **Domain**: all real numbers - **Range**: -90° to 90° (-pi/2 to pi/2 radians) Unlike arcsin and arccos, arctan accepts any real number as input.
Exemple Résolu
Find arctan(1).
- 01arctan(1) = pi/4 radians
- 02= 45 degrees
- 03Verification: tan(45°) = 1
Questions Fréquentes
What is arctan?
Arctan (inverse tangent) returns the angle whose tangent equals the given value. Unlike arcsin/arccos, it accepts any real number.
What is arctan used for?
Arctan is used to find angles from slope ratios, in navigation, physics (angle of elevation/depression), and computer graphics.
What is the difference between arctan and atan2?
atan2(y, x) takes two arguments and returns the angle in the correct quadrant (-180° to 180°). arctan only returns angles from -90° to 90°.
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