This calculator calculates arcsine, arccosine, arctangent, arccotangent, arcsecant and arccosecant and will determine the angle value in both degree and radian measure.
What is Arctangent
The arctangent (arctan (x)) of the number x, is the angle α given in radian measure, such that tan α = x.
Calculate arctangent means to find an angle α whose tangent is equal to the number x.
Range (in radians and degrees):
−π/2 < α < π/2
−90° < α < 90°
-∞ ≤ x ≤ ∞