cos

Description

Calculate the triangular cosine of each element, that is, cos(x).

Mandatory Input Parameters

Parameter	Type	Description
x	array_like	Input array or scalar, in radians

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	Triangular cosine of each element

Examples

>>> import numpy as np
>>> np.cos(np.pi)
-1.0
>>> x = np.array([0., 30., 45., 60., 90.]) * np.pi / 180.0
>>> np.cos(x)
array([1.00000000e+00, 8.66025404e-01, 7.07106781e-01, 5.00000000e-01,
       6.12323400e-17])
>>>

Parent topic: Basic Operation Functions