What is the period of the function y=2cos(4xπ)5?

1 Answer
Mar 12, 2018

π2

Explanation:

In a sinusoidal equation

y=acos(bx+c)+d,

the amplitude of the function will equal |a|, the period will equal 2πb, the phase shift will equal cb, and the vertical shift will equal d.

So when b=4, the period will be π2 because 2π4=π2.