Question

find the period,range and amplitude of the cosine function y=3cos θ.

Answer 1

match with
\[ A \text{ cos}(\frac{2 \pi}{T} \theta + \phi ) \]
where A is the amplitude
T is the period
\( \phi \) is the phase

Answer 2

the range is the y-values : the numbers from the min to the max.