arctan

Description

Calculate the arctangent of each element, that is, 1/tan(x).

Mandatory Input Parameters

Parameter	Type	Description
x	array_like	Input array or scalar

Optional Input Parameters

Parameter	Type	Default Value	Description
out	ndarray/ndarray tuple	None	Location where the calculation result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided, a freshly-allocated array is returned.
where	array_like	None	This condition is broadcast over the input. At locations where the condition is true, the out array stores the result. Elsewhere, the out array retains its original value.
**kwargs	-	-	Other keyword arguments. Refer to the NumPy official document Universal functions (ufunc).

Return Value

Type	Description
ndarray/scalar	Arctangent of each element, in radians. The value range of the real part is [–π/2, π/2].

Examples

>>> import numpy as np
>>> np.pi / 4
0.7853981633974483
>>> np.tan([0., np.pi / 4])
array([0., 1.])
>>>
>>> np.arctan([0., 1.])
array([0.        , 0.78539816])
>>>

Parent topic: Basic Operation Functions