Question

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

Answer 1

The period of the graph is now:

$\begin{gathered} period\text{ = }\frac{2\pi}{\frac{1}{4}} \\ \text{ = 8}\pi \end{gathered}$

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

The amplitude of the graph is 2.