Math module contains a number of functions which is used for mathematical operations. The math.acos() function returns the arc cosine value of a number. The value passed in this function should be in between -1 to 1.
Syntax: math.acos(x)
Parameter:This method accepts only single parameters.
- x :This parameter is the value to be passed to acos()
Returns:This function returns the arc cosine value of a number.
Below examples illustrate the use of above function:
Example 1:
# Python code to implement # the acos()function # importing "math" # for mathematical operations import math
a = math.pi / 6
# returning the value of arc cosine of pi / 6 print ( "The value of arc cosine of pi / 6 is : " , end = "")
print (math.acos(a))
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Output:
The value of arc cosine of pi / 6 is : 1.0197267436954502
Example 2:
# Python code implementation of # the acos() function import math
import numpy as np
import matplotlib.pyplot as plt
in_array = np.linspace( - ( 1 / 3.5 * np.pi), 1 / 3.5 * np.pi, 20 )
out_array = []
for i in range ( len (in_array)):
out_array.append(math.acos(in_array[i]))
i + = 1
print ( "Input_Array : \n" , in_array)
print ( "\nOutput_Array : \n" , out_array)
plt.plot(in_array, out_array, "go-" )
plt.title( "math.acos()" )
plt.xlabel( "X" )
plt.ylabel( "Y" )
plt.show() |
Output:
Input_Array : [-0.8975979 -0.80311391 -0.70862992 -0.61414593 -0.51966194 -0.42517795 -0.33069396 -0.23620997 -0.14172598 -0.04724199 0.04724199 0.14172598 0.23620997 0.33069396 0.42517795 0.51966194 0.61414593 0.70862992 0.80311391 0.8975979 ] Output_Array : [2.6850860217724004, 2.50329950258761, 2.358350863035667, 2.2320996324218134, 2.1172515505585388, 2.009954812757658, 1.9078351422171613, 1.809259917693194, 1.7130011090538158, 1.6180559117526183, 1.5235367418371748, 1.4285915445359774, 1.3323327358965993, 1.233757511372632, 1.131637840832135, 1.0243411030312544, 0.9094930211679799, 0.783241790554126, 0.6382931510021833, 0.45650663181739287]