The word comes from the Latin sinus for gulf or bay, since, given a unit circle, it is the side of the triangle on which the angle opens.
/** * Sine (sinus) - radians: The word comes from the Latin sinus for gulf or bay, since, given a unit circle, it is the side of the triangle on which the angle opens. * * @param x1 angle in radians * @return {Array} */ function neuron555(x1) { return[Math.sin(Number(x1))]; } console.log(neuron555(843));