// Calculates angle of a right-angle triangle in radians
function calcAngle(opposite, adjacent) {
return Math.atan(opposite / adjacent);
}
console.log(calcAngle(8, 10));
// expected output: 0.6747409422235527
console.log(calcAngle(5, 3));
// expected output: 1.0303768265243125
Math.atan(1); // 0.7853981633974483
Math.atan(0); // 0
Math.atan(-0); // -0
Math.atan(Infinity); // 1.5707963267948966
Math.atan(-Infinity); // -1.5707963267948966
// The angle that the line [(0,0);(x,y)] forms with the x-axis in a Cartesian coordinate system
Math.atan(y / x);