Question

Sketch a graph of the function f(x) = - 2cos(1/4 * x)

Answer 1

The period of the graph is now:

`\begin{gathered} period\text{ = }(2\pi)/((1)/(4)) \\ \text{ = 8}\pi \end{gathered}`

The sine graph is also flipped because a = -2 is negative.

The amplitude of the graph is 2.