Sin/Cos

Generates a sinusoidal wave: amplitude × fn(frequency × x + phase°). The fn parameter picks sine, cosine or tangent.

Node

Interactive preview is available in the interactive reader.

Sockets

x (in): Float. Input variable — typically a ramp or time index.
value (out): Float. The wave sample at x.

Parameters

Fn: Function — sin, cos or tan. Default: sin.
Amplitude: Peak-to-centre magnitude. Default: 1.
Frequency: Multiplier on x before the trig function. Default: 1 (one cycle per 2π units of x).
Phase °: Phase offset in degrees. Default: 0.

How It Works

The formula is:

value = amplitude * Math.sin(frequency * x + phaseDeg * Math.PI / 180)

(with Math.cos or Math.tan substituted when the Fn parameter is changed). Tangent is unbounded near π/2 — use it only when you want the discontinuity, otherwise prefer sine or cosine.