java.lang.Math.atan2() in Java Last Updated : 20 Jun, 2021 Comments Improve Suggest changes 2 Likes Like Report atan2() is an inbuilt method in Java that is used to return the theta component from the polar coordinate. The atan2() method returns a numeric value between -\pi and \pi representing the angle \theta of a (x, y) point and the positive x-axis. It is the counterclockwise angle, measured in radian, between the positive X-axis, and the point (x, y). Syntax : Math.atan2(double y, double x) where, x and y are X and Y coordinates in double data type. Returns : It returns a double value. The double value is \theta from polar coordinate (r, theta). Example: Program demonstrating the atan2() method Java // Java program for implementation of // atan2() method import java.util.*; class GFG { // Driver Code public static void main(String args[]) { // X and Y coordinates double x = 90.0; double y = 15.0; // theta value from polar coordinate (r, theta) double theta = Math.atan2(y, x); System.out.println(theta); } } Output0.16514867741462683 Create Quiz Comment S Striver Follow 2 Improve S Striver Follow 2 Improve Article Tags : Misc Java Java-lang package Explore Java BasicsIntroduction to Java3 min readJava Programming Basics9 min readJava Methods6 min readAccess Modifiers in Java4 min readArrays in Java7 min readJava Strings7 min readRegular Expressions in Java3 min readOOP & InterfacesClasses and Objects in Java5 min readAccess Modifiers in Java4 min readJava Constructors4 min readJava OOP(Object Oriented Programming) Concepts10 min readJava Packages2 min readJava Interface7 min readCollectionsCollections in Java12 min readCollections Class in Java13 min readCollection Interface in Java4 min readIterator in Java4 min readJava Comparator Interface5 min readException HandlingJava Exception Handling6 min readJava Try Catch Block4 min readJava final, finally and finalize4 min readChained Exceptions in Java3 min readNull Pointer Exception in Java5 min readException Handling with Method Overriding in Java4 min readJava AdvancedJava Multithreading Tutorial3 min readSynchronization in Java7 min readFile Handling in Java4 min readJava Method References7 min readJava 8 Stream Tutorial7 min readJava Networking6 min readJDBC Tutorial5 min readJava Memory Management3 min readGarbage Collection in Java6 min readMemory Leaks in Java3 min readPractice JavaJava Interview Questions and Answers1 min readJava Programs - Java Programming Examples7 min readJava Exercises - Basic to Advanced Java Practice Programs with Solutions5 min readJava Quiz1 min readJava Project Ideas For Beginners and Advanced15+ min read Like