The sine wave or sinusoid is a mathematical curvethat describes a smooth repetitive oscillation. It is named after the function sine, of which it is the graph. It occurs often in pure and applied mathematics, as well as physics, engineering, signal processing and many other fieldsHave you looked up the definition of "sinusoidal" at all?
Good answer. The key point is that whether it is a "sine" wave or a "cosine" wave depends entirely on when you choose to start your clock (i.e., what point you choose as your reference point for the independent variable). The waveform itself is the same, so in that sense they are really the same signal, it's just how we express it relative to our arbitrarily chosen reference that differs.looks like both
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