Javascript Math atan2()

Introduction

The Math.atan2() function returns the angle in radians between the positive x-axis and the ray from (0,0) to the point (x,y), for Math.atan2(y,x).

Math.atan2() is passed separate x and y arguments, and Math.atan() is passed the ratio of those two arguments. 

Math.atan2(y, x)
  • y - The y coordinate of the point.
  • x - The x coordinate of the point

let a = Math.atan2(9, 15); 
console.log(a);//from   w ww. ja v  a 2s.c  o m
a = Math.atan2(15, 9); 
console.log(a);



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