Well Overall....
The sine wave or sinusoid is a function that occurs often in mathematics, signal processing, alternating-current power engineering, and other fields. Its most basic form is:
which describes a wavelike function of time (t) with:
peak deviation from center = A (aka amplitude)
angular frequency (radians per second)
initial phase (t = 0) = −φ
φ is also referred to as a phase shift. E.g., when the initial phase is negative, the entire waveform is shifted toward future time (i.e. delayed). The amount of delay, in seconds, is φ/ω.