NumPy - arccos() function
The NumPy arccos() function is used to calculate arc cosine (inverse cosine) of given value. The returned value will be in the range 0 through 𝜋.
Syntax
numpy.arccos(x, out=None)
Parameters
x |
Required. Specify array (array_like) containing elements in range [-1, 1], of which the arc cosine is calculated. |
out |
Optional. Specify a location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. |
Return Value
Returns the inverse cosine of each element in x.
Example:
In the example below, numpy arccos() function is used to calculate the inverse cosine of each element present in array cosArr.
import numpy as np
Arr = np.array([0, 30, 60, 90])
#converting the angles in radians
Arr = Arr*np.pi/180
cosArr = np.cos(Arr)
inv_cosArr = np.arccos(cosArr)
print("The cos value of angles:")
print(cosArr)
print("The inverse of the cos value (in radians):")
print(inv_cosArr)
print("The inverse of the cos value (in degrees):")
print(np.degrees(inv_cosArr))
The output of the above code will be:
The cos value of angles: [ 1.00000000e+00 8.66025404e-01 5.00000000e-01 6.12323400e-17] The inverse of the cos value (in radians): [ 0. 0.52359878 1.04719755 1.57079633] The inverse of the cos value (in degrees): [ 0. 30. 60. 90.]
❮ NumPy - Functions
