Javascript oscillation function

oscillate.js

/**
 * Ossilate - Make things go back and forth!
 * TODO: Easings
 * @param {Number} amplitude The distance from the center of motion to either extreme.
 * @param {Number} interval The amount of time it takes for one complete cycle of motion in frames.
 * @param {Number} time The current frame count, ideally a deltaTime value.
 * @param {String} trigonometricFunction The function to be used to calculate the value. Defaults to 'sin'.
*/
oscillate = (amplitude, interval, time, trigonometricFunction = 'sin') => {
    return amplitude * Math[trigonometricFunction]((Math.PI * 2.0) * time / interval);
}