JSFiddle - React, Tailwind, and code Playground

by alexandroppolus

JavaScript

function check(a) {
  var rad = a * Math.PI / 180;
  var delta = 2 + 2/Math.cos(2*rad) - 1/Math.sin(rad) - 1/Math.sin(3*rad);
  return Math.abs(delta) < 0.000001;
}

var a2 = 0;
for (var a = 1; a< 45; ++a) {
	if (check(a)) {
    a2 = a;
  }
}

alert(180 - 4*a2);