Practice: Determine the Amplitude and Period of the function. Then sketch at least one full period.
\[ f(x) = \dfrac{{7}}{{2}}\cos\left(\frac{{2}}{{3}}x\right) \]Practice: Determine the Amplitude and Period of the function. Then sketch at least one full period.
\[ f(x) = \dfrac{{7}}{{2}}\cos\left(\frac{{2}}{{3}}x\right) \]