Python Program for acos() Function

In the previous article, we have discussed Python Program for log() Function
acos() Function in Python:

The math.acos() method returns a number’s arc cosine value. Python acos, also known as Arc cosine, is the inverse of a cosine.

Note: It should be noted that the parameter passed to math.acos() must be between -1 and 1.

Tip: The value of PI will be returned by math.acos(-1).

Syntax:

math.acos(x)

Parameters:

x: This is required. It is a number between -1 and 1. If x is not a number, a TypeError is returned.

Return Value:

Returns a float value which represents a number’s arc cosine.

The acos() function returns the Arc Cosine value if the number argument is positive or negative.
The acos() function returns TypeError if it is not a number.
If it is not between -1 and 1, the acos() function returns ValueError.

Examples:

Example1:

Input:

Given first number = 0.5
Given second number = 1

Output:

The result after applying acos() function on above given first number 0.5  =  1.0471975511965979
The result after applying acos() function on above given second number 1  =  0.0

Example2:

Input:

Given first number = 0.3
Given second number = -0.2

Output:

The result after applying acos() function on above given first number 0.3  =  1.2661036727794992
The result after applying acos() function on above given second number -0.2  =  1.7721542475852274

Method #1: Using Built-in Functions (Static Input)

Approach:

Import math module using the import keyword.
Give the list as static input and store it in a variable.
Give the first number as static input and store it in another variable.
Apply math.acos() function to the given first number to get the arc cosine value (inverse of cosine) of a given number.
Store it in another variable.
Print the above result.
Similarly, do the same for the other number.
Apply math.acos() function to the given list element and print it.
The Exit of Program.

Below is the implementation:

# Import math module using the import keyword.
import math
# Give the list as static input and store it in a variable.
gvn_lst = [0.5, 0.2, 1, 0.8]
# Give the first number as static input and store it in another variable.
gvn_numb1 = 0.5
# Apply math.acos() function to the given first number to get arc cosine value
# (inverse of cosine) of a given number.
# Store it in another variable.
fnl_rslt = math.acos(gvn_numb1)
print("The result after applying acos() function on above given first number",
      gvn_numb1, " = ", fnl_rslt)
# similarly do the same for the other number.
gvn_numb2 = 1
print("The result after applying acos() function on above given second number",
      gvn_numb2, " = ", math.acos(gvn_numb2))
# Apply math.acos() function to the given list element and print it.
print(
    "The result after applying acos() function on given list element gvnlst[1] = ", math.acos(gvn_lst[1]))

Output:

The result after applying acos() function on above given first number 0.5  =  1.0471975511965979
The result after applying acos() function on above given second number 1  =  0.0
The result after applying acos() function on given list element gvnlst[1] =  1.369438406004566

Method #2: Using Built-in Functions (User Input)

Approach:

Import math module using the import keyword.
Give the list as user input using list(),map(),input(),and split() functions.
Store it in a variable.
Give the first number as user input using the float(input()) function and store it in a variable.
Apply math.acos() function to the given first number to get the arc cosine value (inverse of cosine) of a given number.
Store it in another variable.
Print the above result.
Similarly, do the same for the other number.
Apply math.acos() function to the given list element and print it.
The Exit of Program.

Below is the implementation:

# Import math module using the import keyword.
import math
# Give the list as user input using list(),map(),input(),and split() functions.
# Store it in a variable.
gvn_lst = list(map(float, input(
    'Enter some random List Elements separated by spaces = ').split()))
# Give the first number as user input using the float(input()) function
# and store it in a variable.
gvn_numb1 = float(input("Enter some random number = "))
# Apply math.acos() function to the given first number to get arc cosine value
# (inverse of cosine) of a given number.
# Store it in another variable.
fnl_rslt = math.acos(gvn_numb1)
print("The result after applying acos() function on above given first number",
      gvn_numb1, " = ", fnl_rslt)
# similarly do the same for the other number.
gvn_numb2 = float(input("Enter some random number = "))
print("The result after applying acos() function on above given second number",
      gvn_numb2, " = ", math.acos(gvn_numb2))
# Apply math.acos() function to the given list element and print it.
print(
    "The result after applying acos() function on given list element gvnlst[2] = ", math.acos(gvn_lst[2]))

Output:

Enter some random List Elements separated by spaces = 1 2 0.3 0.5
Enter some random number = 0.38
The result after applying acos() function on above given first number 0.38 = 1.181000030320636
Enter some random number = 0.6
The result after applying acos() function on above given second number 0.6 = 0.9272952180016123
The result after applying acos() function on given list element gvnlst[2] = 1.2661036727794992

Know all about Mathematical Functions in Python by going through our Python Mathematical Methods Examples well explained step by step.