or 
or 
where 
and 
are all constants. [M1.6]
describes: any function that has a graph of the same 'wavy' shape as that of a sine or cosine function. [M1.6]
also describes: the graph itself. [M1.6]
is exemplified: by any function of the form or or where and are all constants. [M1.6]
Copyright 1997, The Open University