Question

What are the amplitude and period of y=4 cos(x/5)?


A)The amplitude is 4 and the period is 2pi/5.
B)The amplitude is 4 and the period is 10pi.
c)The amplitude is 8 and the period is 10 pi.
d)The amplitude is 8 and the period is 2pi/5.

Answer 1

A)The amplitude is 4 and the period is 2pi/5.