The term "amplitude" is used to refer to the magnitude of an oscillation, so the amplitude of the sinusoid
is 
, where 
is the absolute value
of 
.
The term "amplitude" is also used to refer to the Jacobi
amplitude, or occasionally, to the complex argument.
See also
Jacobi Amplitude
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Cite this as:
Weisstein, Eric W. "Amplitude." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Amplitude.html
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