// Functions as values of a variable
var cube = x => Math.pow(x, 3);

var cuberoot = x => Math.pow(x, 1 / 3);


// Higher order function
var compose = (f, g) => (x => f(g(x)));

// Storing functions in a array
var fun = [ Math.sin, Math.cos, cube ];
var inv = [ Math.asin, Math.acos, cuberoot ];

for (var i = 0; i < 3; i++) {
  // Applying the composition to 0.5
  console.log(compose(inv[i], fun[i])(0.5));
}