What is the term for the maximum value of a sine wave called?

The maximum value of a sine wave is referred to as the "peak value." This term specifically describes the highest point that the sine wave reaches from its equilibrium or zero line. In the context of waveforms, especially in physics and engineering, the peak value is an important characteristic as it defines the maximum extent of oscillation and is crucial in various applications, including signal processing and electrical engineering.

The term "amplitude" is closely related and often used interchangeably, but it typically refers to the absolute value of the peak (which is always positive), whereas "peak value" can refer to the actual highest point, which can be positive or negative depending on the context. The other terms presented, such as RMS (Root Mean Square) value, reflect different characteristics of the wave and do not pertain to its maximum extent. Similarly, average value typically refers to the mean value over one complete cycle of the wave, which does not capture the maximum point specifically. Thus, recognizing "peak value" as the correct terminology for the maximum value of a sine wave is essential for understanding wave properties in various fields.