- Python Basics
- Python - Home
- Python - Overview
- Python - History
- Python - Features
- Python vs C++
- Python - Hello World Program
- Python - Application Areas
- Python - Interpreter
- Python - Environment Setup
- Python - Virtual Environment
- Python - Basic Syntax
- Python - Variables
- Python - Data Types
- Python - Type Casting
- Python - Unicode System
- Python - Literals
- Python - Operators
- Python - Arithmetic Operators
- Python - Comparison Operators
- Python - Assignment Operators
- Python - Logical Operators
- Python - Bitwise Operators
- Python - Membership Operators
- Python - Identity Operators
- Python - Operator Precedence
- Python - Comments
- Python - User Input
- Python - Numbers
- Python - Booleans
- Python Control Statements
- Python - Control Flow
- Python - Decision Making
- Python - If Statement
- Python - If else
- Python - Nested If
- Python - Match-Case Statement
- Python - Loops
- Python - for Loops
- Python - for-else Loops
- Python - While Loops
- Python - break Statement
- Python - continue Statement
- Python - pass Statement
- Python - Nested Loops
- Python Functions & Modules
- Python - Functions
- Python - Default Arguments
- Python - Keyword Arguments
- Python - Keyword-Only Arguments
- Python - Positional Arguments
- Python - Positional-Only Arguments
- Python - Arbitrary Arguments
- Python - Variables Scope
- Python - Function Annotations
- Python - Modules
- Python - Built in Functions
- Python Strings
- Python - Strings
- Python - Slicing Strings
- Python - Modify Strings
- Python - String Concatenation
- Python - String Formatting
- Python - Escape Characters
- Python - String Methods
- Python - String Exercises
- Python Lists
- Python - Lists
- Python - Access List Items
- Python - Change List Items
- Python - Add List Items
- Python - Remove List Items
- Python - Loop Lists
- Python - List Comprehension
- Python - Sort Lists
- Python - Copy Lists
- Python - Join Lists
- Python - List Methods
- Python - List Exercises
- Python Tuples
- Python - Tuples
- Python - Access Tuple Items
- Python - Update Tuples
- Python - Unpack Tuples
- Python - Loop Tuples
- Python - Join Tuples
- Python - Tuple Methods
- Python - Tuple Exercises
- Python Sets
- Python - Sets
- Python - Access Set Items
- Python - Add Set Items
- Python - Remove Set Items
- Python - Loop Sets
- Python - Join Sets
- Python - Copy Sets
- Python - Set Operators
- Python - Set Methods
- Python - Set Exercises
- Python Dictionaries
- Python - Dictionaries
- Python - Access Dictionary Items
- Python - Change Dictionary Items
- Python - Add Dictionary Items
- Python - Remove Dictionary Items
- Python - Dictionary View Objects
- Python - Loop Dictionaries
- Python - Copy Dictionaries
- Python - Nested Dictionaries
- Python - Dictionary Methods
- Python - Dictionary Exercises
- Python Arrays
- Python - Arrays
- Python - Access Array Items
- Python - Add Array Items
- Python - Remove Array Items
- Python - Loop Arrays
- Python - Copy Arrays
- Python - Reverse Arrays
- Python - Sort Arrays
- Python - Join Arrays
- Python - Array Methods
- Python - Array Exercises
- Python File Handling
- Python - File Handling
- Python - Write to File
- Python - Read Files
- Python - Renaming and Deleting Files
- Python - Directories
- Python - File Methods
- Python - OS File/Directory Methods
- Python - OS Path Methods
- Object Oriented Programming
- Python - OOPs Concepts
- Python - Object & Classes
- Python - Class Attributes
- Python - Class Methods
- Python - Static Methods
- Python - Constructors
- Python - Access Modifiers
- Python - Inheritance
- Python - Polymorphism
- Python - Method Overriding
- Python - Method Overloading
- Python - Dynamic Binding
- Python - Dynamic Typing
- Python - Abstraction
- Python - Encapsulation
- Python - Interfaces
- Python - Packages
- Python - Inner Classes
- Python - Anonymous Class and Objects
- Python - Singleton Class
- Python - Wrapper Classes
- Python - Enums
- Python - Reflection
- Python Errors & Exceptions
- Python - Syntax Errors
- Python - Exceptions
- Python - try-except Block
- Python - try-finally Block
- Python - Raising Exceptions
- Python - Exception Chaining
- Python - Nested try Block
- Python - User-defined Exception
- Python - Logging
- Python - Assertions
- Python - Built-in Exceptions
- Python Multithreading
- Python - Multithreading
- Python - Thread Life Cycle
- Python - Creating a Thread
- Python - Starting a Thread
- Python - Joining Threads
- Python - Naming Thread
- Python - Thread Scheduling
- Python - Thread Pools
- Python - Main Thread
- Python - Thread Priority
- Python - Daemon Threads
- Python - Synchronizing Threads
- Python Synchronization
- Python - Inter-thread Communication
- Python - Thread Deadlock
- Python - Interrupting a Thread
- Python Networking
- Python - Networking
- Python - Socket Programming
- Python - URL Processing
- Python - Generics
- Python Libraries
- NumPy Tutorial
- Pandas Tutorial
- SciPy Tutorial
- Matplotlib Tutorial
- Django Tutorial
- OpenCV Tutorial
- Python Miscellenous
- Python - Date & Time
- Python - Maths
- Python - Iterators
- Python - Generators
- Python - Closures
- Python - Decorators
- Python - Recursion
- Python - Reg Expressions
- Python - PIP
- Python - Database Access
- Python - Weak References
- Python - Serialization
- Python - Templating
- Python - Output Formatting
- Python - Performance Measurement
- Python - Data Compression
- Python - CGI Programming
- Python - XML Processing
- Python - GUI Programming
- Python - Command-Line Arguments
- Python - Docstrings
- Python - JSON
- Python - Sending Email
- Python - Further Extensions
- Python - Tools/Utilities
- Python - GUIs
- Python Useful Resources
- Python Compiler
- NumPy Compiler
- Matplotlib Compiler
- SciPy Compiler
- Python - Questions & Answers
- Python - Online Quiz
- Python - Programming Examples
- Python - Quick Guide
- Python - Useful Resources
- Python - Discussion
Python math.acos() Method
The Python math.acos() method computes the arc cosine of an angle, in radians.
The arc cosine of an angle is defined as the inverse of a cosine function. Therefore, the domain of the arc cosine function is the range of the cosine function, i.e., [-1, 1]; and its range is obtained in the form of radians. They can be converted into degrees using the degrees() method, if required.
Note − This function is not accessible directly, so we need to import math module and then we need to call this function using math static object.
Syntax
Following is the syntax for the Python math.acos() method −
math.acos(x)
Parameters
x − This must be a numeric value in the range -1 to 1. If x is greater than 1 or less than -1, then it will generate an error.
Return Value
This method returns arc cosine of x in radians.
Example
The following example shows the usage of the Python math.acos() method. In here, we are trying to find the arc cosine values for the standard cosine values '0', '-1', and '1' using this method.
import math zero = math.acos(0) neg_one = math.acos(-1) pos_one = math.acos(1) print("Arc Cosine value of 0:", zero) print("Arc Cosine value of -1:", neg_one) print("Arc Cosine value of 1:", pos_one)
When we run above program, it produces following result −
Arc Cosine value of 0: 1.5707963267948966 Arc Cosine value of -1: 3.141592653589793 Arc Cosine value of 1: 0.0
Example
Now let us try to convert the return values obtained from the method in the previous example into degrees using the degrees() method.
In this example, three objects containing the values 0, -1 and 1 are created. Using the acos() method, the arc cosine values of these objects are calculated in radians; which are later converted into degrees using the degrees() method
import math zero = math.acos(0) neg_one = math.acos(-1) pos_one = math.acos(1) print("Arc Cosine value of 0:", math.degrees(zero)) print("Arc Cosine value of -1:", math.degrees(neg_one)) print("Arc Cosine value of 1:", math.degrees(pos_one))
Once the program is executed, the output is produced as follows −
Arc Cosine value of 0: 90.0 Arc Cosine value of -1: 180.0 Arc Cosine value of 1: 0.0
Example
The following example passes non-standard cosine ratios as arguments to this method; then the arc cosine values for these objects are calculated.
import math acos1 = math.acos(0.64) acos2 = math.acos(-0.97) print("Arc Cosine value of 0.64:", acos1) print("Arc Cosine value of -0.97:", acos2)
On compiling and executing the program above, the result is displayed as follows −
Arc Cosine value of 0.64: 0.8762980611683406 Arc Cosine value of -0.97: 2.896027136074501
Example
However, if the arguments passed to this method exceed the value 1 or precede -1, a ValueError is raised.
import math acos1 = math.acos(2) acos2 = math.acos(-2) print("Arc Cosine value of 2:", acos1) print("Arc Cosine value of -2:", acos2)
If we compile and run the program, the output is produced as follows −
Traceback (most recent call last): File "main.py", line 3, inacos1 = math.acos(2) ValueError: math domain error
To Continue Learning Please Login
Login with Google